Errors Midway through Print

I’ve been experience pretty severe print issues midway though a print. Have roughly 3 similar sized models and all have line work across the model like the attached image

This prints are hollow with a 2mm shell. My best guess is that the printer is having trouble breaking from these layers due to the surface area being too great and getting stuck to the printer. An easy enough test would be to try printing one character at a time to see if this still effects it. Any ideas / solutions would be greatly appreciated.

Do you have a drain hole? Vacuum effect can cause this kind of layer striation.

Usually try to get away with not adding them on smaller prints. For prints at this size it’s worth a try to see if that’ll fix it. Thanks for the response!

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