Built from out/AndroidArm64Patched with the local browser-controls sizing change.
The manifest starts at repro.html, but the best current candidate is exact.html. Install this page as a PWA, launch it, then open the exact repro from inside the PWA if needed.
The exact repro is intentionally minimal: no fixed overlay controls, just the reported :active { outline: 0 } plus height: 100dvh layout.