the wifi is useless under MESH situation, by connection with 2,4 GHz + 5 GHz connention wll get lost.
Fingerprint stops working after random time, the visible fingerprint symbol starts shaking and the function is no to use until restart.

Good, it's not just me seeing this, so the chances are good it can be fixed with an update.

another bug, When the screen increases or decreases the intensity of the brightness, a delay or lag occurs

A hardware bug, it leaks. I have 4 BV phones, I have used all in the spa and pool. This is the only one that leaked first dunking. I have also had phones from other brands which didn't leak either