Substances extremely slow down Editor

I’m having about 20 substances in my project, which is not that much, but I’m experiancing extreme stutters when doing as simple things as renaming a folder of deleting a file, which now can take up to 45secs… Substances are mostly set on Built on Level load, but even performing such tasks in an empty scene does nothing.

Removing all substances from my project results in normal behaviour again, so it’s definetely an issue on that side.

It turns out it’s only slowing down the editor when they’re in memory, after restarting it’s ok again. Though it’s silly that when renaming the folder they’re in they’re generated one by one:(

Any idea how I can disable that behaviour? Or atleast discard them from memory after loading? Will Generate and discard substance work for that?