Hello,
NVIDIA GeForce MX250 is quite weak and at the limit of being able to run DeepPRIME. Despite it being allowed to be used for DeepPRIME, if the errors annoy you, I can only recommend to upgrade your GPU or switch to another device (or CPU if no better one) in Advanced Preferences of PhotoLab.
Yes I have this issue as well. Seems to occur randomly, can’t see any pattern to it. It happens with NEF files from Z6 being exported to TIFF files. GPU is GEFORCE GTX 1660, with 16gb intel i5 @ 4.6 GHz. Local adjustments have been applied to the images in most cases.