How do I know if my game has a UI bug?

Look at layouts across screens, whether the UI shows correct information, and whether buttons work. Signs: broken layouts (elements overlapping, cut off, misplaced, wrongly sized), especially on resolutions and aspect ratios different from yours, since UI layout depends on screen dimensions; stale or wrong information displayed (the UI not updating when the game state changes, a value out of date, inconsistent state), since many UI bugs are state bugs; and unresponsive buttons (often because their underlying state is off) plus problems that vary by screen size or aspect ratio. To diagnose, capture issues with device context (to see which screens/resolutions break, since layout bugs are screen-dependent) and the context around UI problems (to see state mismatches). If you have broken layouts (especially on other resolutions), stale or wrong displays, unresponsive buttons, or problems varying by screen, you have a UI bug. UI bugs come from two main sources: screen variety (layout breaking across the resolutions and aspect ratios players use, which your display doesn't represent) and state mismatches (the UI not matching the game state). Both hide on your dev display, the layout bugs because you test at your resolution, the state bugs because you may not exercise the state changes that desync the UI. So the signs come from players (reports of broken layouts, wrong displays, unresponsive buttons) and from the patterns (screen-dependent for layout, state-mismatch for stale displays). Capturing device context (for the screen-dependent layout bugs) and the context around UI problems (for the state bugs) is how you see and diagnose UI bugs that your single dev display and steady-state testing hide.

Why does my UI break on different screens?

Because UI layout depends on resolution, aspect ratio, and screen size, and these vary widely across the devices and displays your players use, so a layout designed and tested at your resolution and aspect ratio can break at others. Elements positioned or sized assuming one screen can overlap, get cut off, be misplaced, or become too small or large at different resolutions and aspect ratios, ultrawide and unusual aspect ratios are especially prone to breaking layouts that assumed a standard one. Your development display is one configuration, so UI bugs specific to other resolutions and aspect ratios are invisible to you, they only appear on the screens you don't use. This is why UI layout bugs are so common and so easy to miss: the screen variety is large (many resolutions, aspect ratios, screen sizes across players' devices), and you naturally test at your own resolution, so the layout bugs on other screens don't show for you. So your UI breaks on different screens because layout depends on screen dimensions (resolution, aspect ratio, size), which vary across players' devices, so a layout that works on your display breaks on others where the dimensions differ, invisible to you since you test at your resolution. The fix involves designing the UI to adapt to different screens (responsive/scalable layout that handles a range of resolutions and aspect ratios, rather than assuming a fixed one) and testing the UI across a range of resolutions, aspect ratios, and screen sizes (to catch the layout bugs on screens other than yours). Capturing UI issues from the field with device context (screen size, resolution) also helps, it reveals which resolutions/devices are breaking, so you can see and fix the layout for the screens players actually use, even ones you didn't test. So UI breaks on different screens because of the screen-dimension dependence of layout combined with the screen variety players use that your display doesn't represent, and addressing it requires designing for the variety (adaptive layout), testing across resolutions/aspect ratios, and capturing field issues with device context to find the screen-specific layout bugs your display hides.

What causes UI bugs in games?

Two main sources, plus ordinary logic bugs. The first is screen variety: UI layout depends on resolution, aspect ratio, and screen size, and since players use a wide range of these, a layout that works on your display can break on others, with elements overlapping, cut off, or misplaced, this is why testing across resolutions and aspect ratios matters, and why your single dev display hides these layout bugs. The second is UI state: much of UI bugginess comes from the interface not matching reality, the UI showing stale, inconsistent, or wrong information because its state didn't update when the game state changed (a display that doesn't refresh, a value out of date, a button that doesn't respond because its underlying state is off, or inconsistent state between UI elements). Games have complex, frequently-changing state that the UI must stay in sync with, so keeping the UI consistent with the game state is a common source of bugs when updates are missed or mishandled. Beyond these, UI has ordinary logic bugs like any code (a button doing the wrong thing, a menu navigating incorrectly). Preventing UI bugs means addressing all three: testing across screens for layout bugs (and designing adaptive layouts), handling UI state carefully to keep the interface in sync with the game state (updating it when things change, avoiding stale state), and capturing UI issues from the field to find the ones specific to screens and states you didn't test. Because UI bugs are very visible and hurt usability and feel, they're worth this deliberate prevention even though they're often less severe than crashes. So UI bugs are caused by screen variety (layout breaking across the resolutions/aspect ratios players use, hidden on your display), UI state mismatches (the interface not matching the game state, stale or wrong displays, unresponsive elements), and ordinary logic bugs, with the screen-variety and state-mismatch categories being the distinctive UI-bug sources. To find and fix them, test across resolutions/screens (for layout, plus design adaptively), handle UI state carefully (keep it in sync with the game state, for the state bugs), and capture UI issues from the field with device context (to find the screen- and state-specific bugs your single display and steady-state testing hide), which reveals the UI bugs players hit across their varied screens and through the state changes that desync the interface.

Signs Your Game Has a UI Bug

Quick answer: Watch for broken layouts (overlapping, cut off, misplaced) especially on different resolutions, stale or wrong info displayed, unresponsive buttons, and problems varying by screen size. UI bugs come from screen variety and state mismatches.

UI bugs, broken layouts, misplaced elements, unresponsive buttons, stale displays, hurt the feel and usability of your game. Here are the signs your game has a UI bug.

Broken Layouts, Especially on Different Resolutions

A direct sign is broken layouts, elements overlapping, cut off, misplaced, or wrongly sized, especially on resolutions and aspect ratios different from yours. UI layout depends on screen dimensions, so a layout that's right on your display can break on others (ultrawide, unusual aspect ratios), a common UI bug.

Bugnet captures issues with device context, so resolution-specific UI bugs are identifiable. Broken layouts especially on different resolutions are a direct sign of a UI bug, and the device context (screen size, resolution) reveals which screens break, since layout bugs are invisible on your display but show on the resolutions/aspect ratios you don't use, device/field data is how you see them.

Stale or Wrong Information Displayed

A sign is the UI showing stale, inconsistent, or wrong information, a display that doesn't update when the game state changes, a value out of date, inconsistent state between elements. Many UI bugs are state bugs (the interface not matching reality), so stale or wrong displays point at a UI state bug.

Bugnet captures context around issues, so UI state bugs are identifiable. Stale or wrong information displayed is a sign of a UI state bug (the interface not matching the game state), among the most common and confusing UI bugs, capturing the context (what the state was versus what was displayed) helps you find where the UI failed to stay in sync with the game state.

Unresponsive Buttons and Problems Varying by Screen

Signs include unresponsive buttons (a button that doesn't respond, often because its underlying state is off) and problems that vary by screen size or aspect ratio (working on some screens, broken on others). Both point at UI bugs, one of state/logic, one of layout across the screen variety players use.

Bugnet captures device context, so problems varying by screen are identifiable. Unresponsive buttons and problems varying by screen are signs of UI bugs (state/logic for the button, layout for the screen variation), and the device context reveals the screen-dependent ones (which resolutions/aspect ratios break), which is key since UI layout bugs depend on the screen variety players use that your display doesn't represent.

Watch for broken layouts (overlapping, cut off, misplaced) especially on different resolutions, stale or wrong info displayed, unresponsive buttons, and problems varying by screen size. UI bugs come from screen variety and state mismatches.