Noir partially not printing good

I started with my new Noir today and printed this stl test file 5 times on one platform.
4 times It came out great (although I stopped it halfway) but the one in the middle failed. It printed the raft, but then everything sticked to the fep.
Any ideas why? Maybe the fep is too flexible in the middle?

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Properly increase the exposure time of the bottom layer or move it down by 0.3mm during leveling to increase the adhesion between the platform and the model.