Seems like their behavior/aggression goes to maximum dumb at very random times, during or before they are being fought. I've managed to record two separate cases where they do, but I've seen it happen a couple times before too.
AI breaks before fighting: https://clips.twitch.tv/CheerfulElatedRavenStinkyCheese-WO8WwNNuKm4BF7dE
AI breaks while fighting: : https://clips.twitch.tv/BeautifulKitschyGiraffeWholeWheat-VIzZIl6etAULRhvL
Unknown, but the recorded clips were taken from a Frenzy Lv2 Owlitzer run if that helps.
Additional note: The character used in the clips is "vanilla" and didn't get anything unlocked or go through any modifications via dev mode. Also, the log file is a dummy because I couldn't find any log file in my documents/klei or rotwood demo folders and I couldn't submit this report without uploading one. edit: uploaded what i think was my log file for that session. 1st clip was somewhere in between 1:10:00~1:15:00 I think
re-edit: Removed previously uploaded log file. After looking back, it was not even the correct one...sorry I didn't double-check! Also seems like I couldn't even find my logs before the 20th anymore (do they auto-delete?) so I can't provide the right file now even if I wanted to. 
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