Oh yeah, just remembered another suggestion I had. It seems like your "enemy" events are set to Player Touch, which means the combat starts only if the player actively runs into them. I would suggest setting them to Event Touch instead, so that combat also starts if the monster runs into the player. Unless this is a deliberate design choice, of course...
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Oh thanks, enemy events are defnitely a bit wonky haha
Actually, I think the problem is that I'm using priority as "Above characters". For some reason RPG MV doesn't always trigger.
It's like that because if I use "Same as characters" then the folowers can block the enemy path and combat won't trigger, and I didn't like it.

I guess I could use some parallel processing to check event and player position...
Anyway this sure needs some polishing