I’m having the same problems with my PEI plates. I print almost all ABS and I hate using glue. I have both the black and gold PEI plates. I print overnight so it’s stone cold when I remove it in the morning. Both plates work awesome for 10-20 prints and then the ABS starts “becoming one” with the plate and being impossible to remove.
Bambu says these plates are suitable for ABS with no glue, but I’ve now got two ruined $40 plates and I’m pretty upset. My support ticket with pictures has been open for over a week with nary a response (maybe because of the new year). Based on this thread, I’m wondering if they will be saying “oh yeah you have to use glue anyway, we just say no glue to sell plates” and you’re stuck with damaged product now.