The internal function relies on `CustomData_copy_data_layer` currently, which doesn't work for BMesh. Support could be added as a special case for BMesh, but in the meantime avoid bugs by just changing the poll.
The internal function relies on `CustomData_copy_data_layer` currently, which doesn't work for BMesh. Support could be added as a special case for BMesh, but in the meantime avoid bugs by just changing the poll.