Chunks missing in 3d prints

[orthokay]

Hi all!
I currently am using desktop health Einstein printers - e-model Z- beige and the equivalent key print resins. I am having trouble printing multiple models at a time. Calibration comes out perfectly, one model prints great. Multiple models and some models are coming out with massive “chunks” missing. I have been troubleshooting a few things/ supports, build style, flat vs 45degree hanging models. I am at a loss at what could be causing this type of failure- any insights or anyone experience the same issue?

Not to mention desktop health has now been bought out by sprint ray which is a roadblock of its own.

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[Cleo]

Is it the same area on the platform that the prints fail? If that is the case you may need the projector replaced. I had to replace mine every 18 months or so. Also check your o2 generater. Those can slowly go bad.