This REALLY is a BUG REPORT, but I have been unable to find out where to send it! But I have found how to write it. S here it follows:
The “imported” bookmark drop-down menu does not function correctly.
When trying to access a bookmark located beyond the 2nd level, the child drop-down menu disappear on the right hand side instead of folding back on the left. Thus children drop-down menus are not accessible.
I have updated Brave today & this error was already present in the previous version.
Update Channel: Release
OS Platform: Microsoft Windows
OS Release: 6.3.9600
OS Architecture: x64
Keep up the good work!