Hi r/leagueoflinux,
Riot are aware of the crashing immediately upon entering a game after patch 13.22. The issue is (seemingly) not exclusive to Linux
The r/leagueoflegends patch 13.22 bug megathread includes many reports from Windows users with the same issues. Additionally, an announcement in the client reads:
We have identified an issue where the game closes while loading or immediately after loading is completed, and we are currently working on fixing it. We apologize for any inconvenience this may cause.
If the issue persists for Linux users after patching is released from Riot and confirmed working by the broader community, r/leagueoflinux will reopen with immediate effect to collaborate on necessary fixes.
It has been longer than I would have liked since the last major announcement in this subreddit. I am also aware that many of you share the same sentiment. Although the subreddit is still currently restricting new submissions, we are actively discussing amongst the mods the best way to move forward with the community. Expect a more detailed announcement to follow. Thanks everyone for your patience, your feedback is being heard.
https://old.reddit.com/r/leagueoflinux/comments/17qimi8/riot_are_aware_of_patch_1322_crashing_issues_are/
To me PBE is not going in-game, doesn't even begin loading the window.