testing env : windows10 and 7 / Unity 2019.2.18f1 i7 6700k, 32gb ram. first sorry, i can't english well. hello, i have some problem. i have project for asset bundle build only. this project included 200,000++ sprites + some scripts. and, sprites packaged with sprite atlas. if, i enable Editor -> Sprite Packer -> Mode -> Always Enable or Build only, i get critical memory leak issue. (if i start asset bundle build then my editor stopped, and Memory increase to grow at 20-30 megabytes per second.) but, i disable sprite atlas pack option, problem does not occur. xD I think it's a bug with sprite packing. doesn't always. but sometimes i see this problem. Temporary solution: Delete Library-> AtlasCache if delete atlas cache, again working for me Does anyone have the same problem?