Hello,
I have discovered a weird bug about adding backdrops on standard display mode:
When you paste an image / add backdrop to a layer it works fine and can add infinite numbers of them but only if there is no layer behind the layer currently used to paste image / add backdrops
When there is a layer behind it will act as creating actives as it will be limited to object limit and will lag the app the more you add them which is a very weird behavior as it works perfectly fine if there is no layer behind
to summarize all this up: it simply only works correctly if you paste image / add backdrops on layer 1
Note: it seems like a very old bug as it can be reproduced on MMF2
Here is an example that shows the problem, if the "Generic layer" is moved behind "Main layer" it produces the problem:
Add backdrop bug.mfa