I also am having this exact problem, where randomly Brave will turn to an all blank screen and I have to quit and relaunch. I have also noticed Grammarly acting weird and Brave taking a lot of my CPU resources the past day. (As described in the other thread @andresurena mentioned) Didn’t realize it was all related! I will try disabling Grammarly to see if it fixes the problem, then report back. Thanks for the tip @andresurena and @DSGROUSE ! I hope that this issue gets fixed so I can use Grammarly again.
Mac OS Catalina 10.15.1
Brave Version 1.12.114 Chromium: 84.0.4147.135 (Official Build) (64-bit)
Grammarly Version 14.970.0