Quick answer: Your UI breaks at different resolutions because the layout assumes a specific resolution or aspect ratio instead of adapting: elements at fixed absolute positions get mispositioned, a 16:9-designed layout breaks at other aspect ratios (floating on ultrawide, overlapping on narrower screens), UI that doesn't scale is wrong-sized at high or low resolutions, and UI ignoring safe areas gets cut off on devices with notches/overscan.
UI that looks perfect at your development resolution but breaks at others, buttons off-screen, text cut off, elements overlapping, is a layout problem: the UI was built for one resolution/aspect ratio and doesn't adapt. Since players use a huge range of both, UI must be built to adapt.
Why UI Breaks at Different Resolutions
UI breaks across resolutions when its layout is tied to specific dimensions rather than adapting. Fixed positioning: elements placed at absolute positions/sizes for one resolution end up mispositioned or wrongly sized at others. Aspect-ratio assumptions: a layout built for 16:9 breaks at other ratios, on ultrawide (it stretches or floats with too much space), on narrower/taller screens (elements overlap or go off-screen). No scaling: UI that doesn't scale with resolution is too small at high resolutions or too big at low ones. And ignoring safe areas: on devices with notches/rounded corners/TV overscan, UI in the unsafe regions gets cut off.
The root issue is the UI assuming one screen configuration. Players span many resolutions and aspect ratios, so UI that doesn't adapt breaks for many of them.
How to Diagnose and Fix It
Test across resolutions and aspect ratios, the breaks reveal themselves when you change them. Try a range (low and high resolutions, 16:9, ultrawide, narrower ratios, safe-area devices) and see where elements overlap, get cut off, or are wrongly sized. Bugnet captures reports with device context (resolution, aspect ratio), so UI-break reports and the configurations they affect surface (ultrawide users, mobile users).
Fix with responsive UI: use anchoring (position elements relative to screen edges/regions), appropriate scaling (so UI is readable at high res and not oversized at low), responsive aspect-ratio handling, and respect safe areas. See our guide on fixing UI that breaks at different resolutions.
UI breaks across resolutions when it assumes one screen size. Use anchoring and scaling so it adapts, handle ultrawide and safe areas, and test the full range of resolutions and ratios.