Barcode scanner bug? Cam don't open on Android

My App/Pages Support link:
https://go.glideapps.com/support/9bdc7faf-7c4d-4317-9cbf-8aab81bc7504

Describe the bug:
Barcode scan button cannot open camera in installed app on Android. Just white rectangle with gray line are showed. Permission for camera is granted.
UPD: Yesterday in Chrome browser camera opened normaly, but today neither work in app nor in browser.
UPD2: Surprisingly, gray line sometime becomes yellow, and even green somewhere around the real barcode (without showing the cam picture on screen)

Expected Behaviour:
Camera live image after tap on Scan Barcode button with barcode feature.

How to replicate:
Install as app (Add to desktop) on Android from Chrome.

Demonstration:

So this does work intermittently? Have you tried this on an iPhone?