Print failures when arraying?

Has anybody had this experience? I print small parts and test out whether the parts print succesfully or not by printing them individually first. Once I succesfully print them individually, I then print arrays of them. Some parts of the array start to fail and break away from the supports and it alway seems to be away from the mixer arm side. Are there increased forces in the resin tank when filling a print bed/ arraying models? Models at the mixer arm side seem to print succesfully most of the time. Has anyone else had this experience?? Does anyone have any tips when it comes to arraying small models??