Recently upgraded to Version 2.1.56 (07fd88dd) Python 3.9.15 Qt 6.4.0, and I noticed suddenly that the app was extremely slow and laggy when Gsync is on. The mouse has noticeable slowdown as I drag it through the screen, but all other applications work fine in Gsync
However, if I go into my Nvidia Control panel, and disable Gsync, the sluggishness is noticeably gone, and I can use Anki without any issues.