I’m still losing logged sessions, mainly after versions updates. Happened in 1.18.78 and subsequent ones, and it’s still happening with V1.21.74 (Mar 6, 2021).
Not sure yet, but seems to happen with some site even without updates, when you reopen Brave multiple times. As I usually keep it open for days suspending the machine.
OS: Fedora release 33 (Thirty Three) x86_64
Host: Aspire VX5-591G V1.08
Resolution: 1920x1080, 1920x1080
DE: GNOME 3.38.3
CPU: Intel i5-7300HQ (4) @ 3.500GHz
GPU: Intel HD Graphics 630
GPU: NVIDIA GeForce GTX 1050 Mobile
Memory: 6964MiB / 15870MiB