Asset Bundle Build Memory Problem..

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?