Thanks for being vigilant @KingSpinosaurus. ^^ So far it seems that either the House Decorator or the Clear House Parts feature seems to be at fault. If you're moving to a new house soon, what I can recommend is to first store your plants the "old fashioned" way as Masquerade said, by going into your inventory and clicking "remove" on each placed plant pot. I would do this for any placed eggs too, but within the pixpet inventory. Then you can safely use Clear House Parts (under the Housing tab) to remove everything else. And you don't have to worry about the House Decorator since only Patreon supporters have it.

This bug takes hours to have an effect, also, so as long as you move into your new house immediately after leaving your old one (and place your plants), you won't have any problems.👍