Debugging a WebView Crash on a Single Android Device
5 min read
One of the trickiest bugs to chase is the kind that only reproduces on a single device. This post walks through a crash that only showed up on a BLU B160V running Android 14.
The root cause turned out to be incomplete Intl.NumberFormat support in an outdated Android System WebView. The fix combined a manual fallback formatter with an ErrorBoundary wrapper so a formatting failure degrades gracefully instead of crashing the page.
The bigger lesson: WebView versions can lag far behind the OS version on budget devices, and formatting APIs are a common blind spot in cross-device QA.