Delaminating in the middle area of photon printer
The print you do is a sealed cup in the position it sits directly on the build plate. As a result, there is a column of resin in the cup as you print and at some point, the weakest spot delaminates, the air gets into the column and drains.
Take the print and either angle it by a few degrees so the hole in the top becomes a vent or add a tiny extra vent-hole.