Over and over we're noticing more filters are malfunctioning. It seems that the variables AbuseFilter supplies are incorrect, or it's reading the data in the wrong way, something related to the variables...
And today we got this report where a perfectly crafted filter did not trip edits that it should have. On English Wikipedia we have 0% of filters exceeding the condition limit, so there's no excuse for this filter to not work.
Fortunately it doesn't look like these issues are widespread, but they are letting some bad edits get through while logging good edits when they shouldn't be. I'm not aware of any disallowing filters that are malfunctioning, but it seems we can't rule that out given the unpredictability of the extension.
I suspect something changed earlier this summer that introduced all these seemingly related bugs. All three of the above tasks have received no attention from maintainers. I'm very unfamiliar with the codebase but I'm going to try to dig through the git log and see if anything stands out as a possible culprit, but any help is greatly appreciated. Many thanks!