I haven't tested extensively, but noticed that More Furniture's alternative dresser doesn't work with one of RIMkea's beds (it says the comfort bonus is "inactive", and there's no line indicating it's connected to the bed either). RIMkea does work with the vanilla bed attachments.

I don't know on which mod's end this could be fixed, but I expect More Furniture's bed addons generally don't work with non-vanilla beds. Is this a known issue?