TarnaqPrints have a ridge
Are you printing this near the center of your print bed?
I suspect that the object is not fully peeling off the FEP film, but just pulling it up for some of the layers. When it eventually releases the print continues.
I think you should lift higher, maybe double it to 10mm, to make sure that it completely separates from the film every layer.
Given my experience, this is what I would say too. Not separating from the FEP.
KairuByteSuction cupping causes the print to rip from the build plate/supports, it wouldn’t cause this. Especially since it continues along as if a few layers were cut out of the file, which just isn’t something caused by suction cupping. It would essentially need to be stuck to the FEP to such an extreme degree that the stepper motor is unable to move.
Suction cupping causes the print to rip from the build plate/supports
It can cause both, actually.
A loose FEP wouldn’t cause the print to essentially perfectly skip over multiple layers. Once the FEP finally releases, there would be multiple layers missing, resulting in a very gloppy thick layer, or the remaining layers printing directly on the FEP.
I can’t think of any situation a loose FEP could result in the above image without at the very least one “extremely large” layer.