Today someone pointed out someone pointed out that my bots did duplicate edits on Commons. I often have multiple bots running that might collide a bit and this would just give some edit conflicts and one of the bots would wait a bit. I tested this multiple times in the past and never had duplicate edits.
To test this now I fired up two bots up on the same category. https://commons.wikimedia.org/w/index.php?title=File%3A%22A_Muslim_Pilgrim_Learns_a_Lesson_in_Piety_from_a_Brahman%22%2C_Folio_from_a_Khamsa_%28Quintet%29_of_Amir_Khusrau_Dihlavi_MET_CAT_12r1_89A.jpg&type=revision&diff=464154718&oldid=428228218 is what happened and no edit conflicts. Checking my recent edits I see a whole bunch of duplicates. I have only done minor updates on the client code and haven't updates Pywikibot recently, the only thing that has changed is that MediaWiki 1.36/wmf.9 seems to have been deployed yesterday on Commons