It’s been a while since I used my resin printer, but I had a similar problem at one point and it came down to the support connection to the print… No matter how many supports I put, it didn’t change the outcome, but when I made the support thicker and made the connection point thicker, suddenly I had no more problems… It just meant a little extra post processing on some parts

In other words, a big customer finally got effected

Well the reason I asked about the hotend was because of you’re using the little glass bead version of the thermistor, and the hotend has the hole to feed through, I had an issue on an old Frankenstein ender where it wasn’t touching the metal inside correctly… As it heated up, it would kind of move the thermistor away from the metal. I solved this by putting a DIY metal shroud on it that held it in the middle while touching the hotend all around. I also used thermal paste to make sure there was no gaps.

I changed the thermistor “sensor type” from “EPCOS 100K B57560G104F” (same as the bed) to “Generic 3950”, no change.

What actual thermistor are you using?

Also since I’m half asleep and too lazy to read the previous posts to see if you listed it, what motherboard and hotend