Hey there @JessicaLiu520! Welcome back to the community! There was a memory leak in 5.2 that was reported, that I had believed was corrected with hotfix 5.2.1 but that may or may not be the case it seems. If this is the same bug, I know with (some) certainty the current 5.3 release had corrected it as I was running into the same issue. Does this still occur on fresh 5.3 projects?