Quick answer: Watch for crashes without reports, unexplained churn and bad reviews, a gap between affected players and reporters, and not capturing crashes automatically. Most crashes are silent, so they're invisible without automatic field capture.
Silent crashes, crashes players hit but never report, are the norm and the most dangerous, since they cost you players invisibly. Here are the signs your game has a silent crash problem.
Crashes Happening Without Reports
A sign is crashes happening (visible in your crash data, if you have it) without corresponding reports, the affected-player count far exceeding the number who reported. If many players are crashing but few report, those crashes are silent, hitting players who don't tell you, which is the silent crash problem.
Bugnet captures crashes automatically, revealing the silent crashes the few reports don't. Crashes happening without reports are a sign of a silent crash problem, and capturing crashes automatically is what reveals them, you see the true affected-player count (far exceeding reports), which exposes the silent crashes (the many players crashing without reporting) that reports alone would never show.
Churn and Bad Reviews You Can't Explain
A sign is churn and bad reviews you can't explain, players leaving or complaining about crashes while you have few or no crash reports. Silent crashes drive churn and bad reviews invisibly (players crash and leave or review without reporting the crash), so unexplained technical loss points at silent crashes.
Bugnet captures crashes from the field, revealing the silent crashes behind the loss. Churn and bad reviews you can't explain are a sign of silent crashes (driving the loss invisibly), and capturing crashes from the field reveals them, turning the unexplained churn and reviews into visible silent crashes you can fix, since the silent crashes are the cause behind the otherwise-mysterious technical loss.
Not Capturing Crashes Automatically
The definitive sign is meta: if you don't capture crashes automatically, your crashes are silent by default, you depend on reports, and most crashes go unreported. A game without automatic crash capture has a silent crash problem by definition, since most crashes are silent without it, making the absence of automatic capture a guarantee of silent crashes.
Bugnet captures crashes automatically, eliminating the silence. Not capturing crashes automatically is the definitive sign of a silent crash problem, since without automatic capture you depend on reports and most crashes go unreported (silent), the fix is simply to capture crashes automatically, which turns silent crashes into visible, actionable data, eliminating the silence.
Watch for crashes without reports, unexplained churn and bad reviews, a gap between affected players and reporters, and not capturing crashes automatically. Most crashes are silent, so they're invisible without automatic field capture.