ANYCUBIC PHOTON MONO 2 | PRINTING MINI ISSUES ON THE PLATE

Hey, does anyone know what the issue may be thats stopping miniatures sticking to the plate? Im not sure if there is an issue with the machine. First two sets of prints came out no issues, but now i cannot seem to get these to print full sets of mini's. It seems lower left corner is the only area that allows for a mini to print on. Thanks.
Printing HeroQuest and Warhammer Quest Miniatures... they certainly will take a while to get through my list. But hopefully not too long.

[@johnhenry7097]

Sand the buildplate.