After naming a red mushroom on an anvil, I placed it in a potted plant, and upon right-clicking to retrieve the red mushroom, the name was gone - this also happens with dandelions and cornflowers, so I assume that this is likely the case for any potted plants. If bees can retain names when entering/exiting hives, I believe it should also be allowed for potted items to retain such data when being potted/removed. I hope it's right to call this a "bug," since it seems that anvil name retention was not implemented in flower pot-specific cases.