Question Unloading scene asset bundle doesn't seem to have an effect

Hi there

I seem to have a bug where unloading a scene asset bundle doesn't seem to have the expected effect on memory.

I am moving from scene A, loaded from asset bundle A, to scene B, loaded from asset bundle B. They are both about 18.8MB in size as a compressed asset bundle.
In my logic, about a second after moving to scene B, I unload the scene A asset bundle with

unloadAllLoadedObjects

set to

true

.

However, when using the profiler, I see that while the function is called, and it has some effect (textures, audioclips, etc are decreased by a few MBs), the memory of the game does not drop significantly (I expected it to be at least the compressed size + uncompressed size of loaded assets).

During the scene transition, I can see that the memory significantly increases (about 400MBs) and then drops back to normal. This makes sense because a new scene is loaded and the old one is discarded.

Am I missing something? Was I supposed to see a memory drop at all, or does the scene transition take care of it already? Please advise!