Is there a changelog somewhere on the Serial library? I would like to find it and see it if there is.
My app compiled with the latest version of B4A (not beta) people are complaining about random disconnect issues on the Bluetooth. Whereas my older apps compiled with a version older than 8.5 did not have issues.
On a tablet running Android 5? I don't think so. We supply the tablets that come with our boards and they are running android 5, some of them updated to 6. None of them have the Android 7 or 8 update, and probably wont because it is an older model.