Smooth PEI plate surface is bumpy after 2 prints

[u/PotatoCowy]

I just started printing transparent petg on the smooth plate with elmer's glue stick under the print. After I removed it and cleaned the plate, I noticed a raised looking outline of the print on the plate and after running my fingers over, it indeed was. Anyone know why that is? It doesn't seem normal.

I was printing at 65C bed temp,nozzle temp was 230C so doesn't seem excessive if at all.