This is not only on sv.wikipedia.org
|operations/mediawiki-config : master||Revert "Enable AbuseFilterCachingParser by default"|
The specific change which happened, as far as I understand it, is that the precedence remained the same, but apparently the new parser treats boolean operators as right-associative, whereas it used to treat them as left-associative. This is an oversight on my part. I will write a patch to fix that and add tests.