Since August 2020 I often seem to be getting "Invalid CSRF token" errors in Pywikibot. At first I thought I messed something up in my own code, but I get a whole bunch of them using touch.py. I've only seen this error on Commons, but that might be because I've not run a lot of stuff on Wikidata. I'm using the latest git version from this month. I'm pretty sure I haven't seen this error before or at least not as often as now. It seems to be coming in waves (intermittent problem). It's unclear to me if this is caused by the Mediawiki-api, Pywikibot or the two of them not properly communicating.
I wonder if it's visible in logstash.wikimedia.org/ if a user is hitting this error and if so, if an increase is visible.