In attempting to open a pop-up window, such as exporting Bookmarks results in the window appearing for a brief time (< 1 sec) then closing. The user cannot export bookmarks, or download files (such as pdf files)
This is reproducible, by bringing up the bookmark manager then attempting to export bookmarks. Only worked the first time when installing a new brave browser version, 2nd time and there after the popup window always disappears.
Operating System: openSUSE Leap 15.2
KDE Plasma Version: 5.18.6
KDE Frameworks Version: 5.71.0
Qt Version: 5.12.7
Kernel Version: 5.3.18-lp152.106-default
OS Type: 64-bit
Processors: 6 × Intel® Xeon® CPU E5-1650 v2 @ 3.50GHz
Memory: 31.3 GiB of RAM
Version 1.34.71 Chromium: 97.0.4692.56 (Official Build) beta (64-bit)
I created a new Brave-beta software repository, removed the current Brave code from my OS and installed a fresh version. Problem still there.
Doing a google search shows 1 person asking about this exact problem in November.