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BPR shadows and AO not rendering

I’ve had this problem for a long time noww. Sometimes when I render with BPR, the shadow pass doesn’t render. Then, when I press render again without doing anything else, the shadow pass renders but AO doesn’t. Then, when I press render, the AO pass renders but the shadow pass doesn’t-

This is driving me nuts. Is this a bug or am I not getting something?

Not really a bug, but I have noticed that if I am doing test renders, you know, making subtle adjustments to settings and such, the rendering engine gets confused. My remedy when this happens is to tap on the canvas so the last render is cleared and i am back in edit mode. Slightly move the model, then move it back (using timeline is crucial for storing positions) and re render. The new render will do all of the passes. It is annoying, but not a huge problem in the scheme of things:)