That doesn't surprise me since they likely all rely on editing the same files in the story editor. Most mod authors don't test / patch for compatibility with other mods that aren't theirs.
Do you mind sharing your process for creating this? I've been wanting to make custom backgrounds for a while that tie into vanilla inspirations tables but can't figure out how to do it.
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https://mod.io/g/baldursgate3/r/how-to-create-custom-backgrounds-with-inspirations