Fantastic job on fixing that bug!
I, on the other hand, have failed. I wasn't able to reproduce the stare contest bug. I reset my save because I was seemingly hardlocked into fighting that battle and getting that NullReference over and over. In that older run I got that stare off really commonly, like every third adventure or so. it happened on early stages like the easy expeditions on a bunny but it happened the most frequently with the werewolf, probably because the fights lasted longer and it had more time to occur. It didn't matter which level of the adventure it was in and it was also seemingly not dependent on the enemy type but now during this new run, I haven't gotten it a single time. There was no visible exception unlike the NullReference which I am sure you have identified correctly.
Oh well, maybe it was just happening when your character has a very specific speed stat or status. I do remember that the debuffs (the DoT and weakening) I inflicted on the enemy also lingered way into when the little Satyr returned home so maybe those status effects not being terminated properly had something to do with it. I do not know! xD
If I can help you in any way, for example, test anything else, spellchecking or so, just let me know! A more organized way to report bugs would be helpful I think!