Last night I was helping a friend set up Yoroi wallet and delegate. Messaging back and forth.
He’s using a modern iphone. I’m not sure of the model.
He tells me he hit delegate, entered spending password successfully, but wasn’t sure anything had happened so backed out and repeated before telling me.
It had worked the first time and the transaction ID shows the 2 ADA deposit and transaction fee paid.
Somehow it allowed him to repeat the process, but this time only paid a transaction fee.