Printing problem Prusa i3

Hello, i need to print 32pcs of the same model and at piece no. 12 a problem occured. Printing went smoothly for about 60% of the time and after thet printer suddenly like skips a layer or something i cant really explain it. Can someone help with this issue?I am using Prusa Original i3 printer with Prusaslicer, PLA Filament 215 °C / 60 °C.Thank you

what print speeds are you using?
If you're pushing filament through the nozzle at a relatively high speed, it also can cool the nozzle down to the point where the filament will no longer extrude. It won't hurt your print to add another five degrees to the nozzle as a test.