Fw 4.01 potential issue

I'm having an issue with my flipsky 4.20 dual plus after updating to the newest firmware. First being wobbles over 25 or 26 mph. Also if I change a setting on the app it won't write then kicks my phone off the app (Android 10) and I cannot even connect to the board till I plug it into a computer and do a set up wizard.  When I try to connect to the app it says. "Could not read firmware version. Make sure the selected port really belongs to the vesc."

Any help would be appreciated. Thanks.