about 3 years ago - /u/ - Direct link
We are currently investigating reports that some users are experiencing issues when running on 3.3.3. We have enabled a the 3.3.2 rollback branch for those of you experiencing stuttering and performance issues after the latest patch.

To roll back: right click Stellaris, go to Properties, Betas tab and choose "3.3.2 Libra Rollback" from the drop down.
about 3 years ago - MrFreake_PDX - Direct link
Originally posted by Winkrometer: In case it helps your investigation: The game seemed to be working fine for me after installing 3.3.3, but as soon as I tried to take the "Galactic Wonders" ascension perk, my game immediately stalled. I reproduced it several times - played normally for several game days with no issues, tried to take the perk, game stall. The 3.3.2. Libra Rollback resolved the issue.

If you like, you can add your savegame and the details shared here to this bug report thread[forum.paradoxplaza.com]. Every report helps. :)