Well, I thought that issue was fixed because I haven’t had a crash in ages. But it’s possible that it’s a mix of not being as bad as it used to be, plus my work-around from way back still being in place.

So of course, you know that the game crashes when the memory leak eventually fills up the memory and you run out.

But a long time ago, when it was so bad that it would crash in 10 minutes, I did a work around which involved simply increasing the swap size to 64 GB (or 32GB… i forget, whichever was the max selection in cryoutils). This way, my usually sessions (1-2 hours) would be shorter than it would take the game to run out of memory with that swap size.

Like another commenter said, the UbiConnect client is the culprit. And turning off the in-game overlay by opening it in desktopmode and changing the settings would help. Also be sure to use Proton Experimental or Proton Hotfix as your selected Compatibility layer.

I have both the UbiSoft Connect version and the Steam version installed, and both work fine for me these days.