Pywikibot is losing session again, this time with enwiki and testwiki in tests occasionally:
https://ci.appveyor.com/project/Ladsgroup/pywikibot-g4xqx/builds/32447076/job/7sgusih9oercuijl?fullLog=true

The issue seems to be related to T244635, where MediaWiki produces some weird issues becuase of blocked IPs.

Needs to be investigated using mitm/proxy like in T224712 case, see https://www.mediawiki.org/wiki/Manual:Pywikibot/mitmproxy for more details.

This is not related to maxlag, not related to any of old issues, it seems like something completely new.