You sure it is a 50% chance? Because if so I am super lucky. Out of the last 12 encounters only once did I have to do any actions. Lol
And yeah, I fully agree with your confusion. I have been a pc technician for many years and am used to recreating errors and such to find back doors by an issue. I tried exiting the minigame, talking to different NPCs, wearing different gear, and such. Was thinking it was a coding issue where specific events triggered the lock-up as often times that is the case. Once you pointed out it was a hardware issue I was like "okay, so RPG Maker has an issue with my tablet. Interesting...".
Let me look into it a bit for ya and see if I can figure anything out. I have to go in for surgery today so it may be a couple of days before I get any solid results.