A pdf browser exploit would fetch a high price in bug bounties, I doubt it'd be wasted on you. I don't think there's been a 0day like this in the wild now for a quite a while.
Was probably the issue with mine. If they asked for the room number I'd give it to them. I guess I'll put in brackets next to the building name next time. Seemed to work fine without it before but I guess it was lacking enough challenge for Thai immigration's tastes.
Online reporting keeps getting rejected, are we back at Chengwattana Immigration or are we still going to the Covid Carpark?
Sorry for making a new thread just for this but I couldn't find the info.