I wanted to block the possibility of sorting in the extrastorage crafters. I tried to use IMC to tell the inventory sorter to add the container to the blacklist and I found this.
While loading Forge:

After clicking the middle mouse button:

I wanted to add that the containerTypeName does not respect the container name I clicked

refinedmods/refinedstorage#3214

Interesting. I'll have to take a look.

I have also encountered this in the past. From what I remember the config gets loaded after IMC and flat out overwrites anything that was set using IMC.

This has been fixed for 1.18.2 with this PR.
In 1.19.2 this problem still exists (changes were not ported)

This still exists on 1.20