I've just spoken with an individual who ended up rekeying their account, then rekeying it again back to their original account under the assumption that it was still somehow rekeyed. I tested on my own device and sure enough it treats it like any other rekey even though the protocol is removing the rekey.
I'd recommend displaying a warning like "This action will remove your rekey" if already rekeyed, or disallow the action all together if the account isn't already rekeyed.
I've just spoken with an individual who ended up rekeying their account, then rekeying it again back to their original account under the assumption that it was still somehow rekeyed. I tested on my own device and sure enough it treats it like any other rekey even though the protocol is removing the rekey.
I'd recommend displaying a warning like "This action will remove your rekey" if already rekeyed, or disallow the action all together if the account isn't already rekeyed.