At first this seems like a bed level issue but the strange thing about your photo is that the outside loop looks OK. If the bed was low on that side, the whole thing might not stick. Is that part of the acrylic sanded, which will allow the PLA to stick better? One idea might be to throw some glue stick on to part that does not stick well. That will raise the level of the bed slightly and give the PLA something additional to adhere to. I know this would work with a glass bed, which is what I'm using, but don't know if glue stick works for PLA on acrylic.
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