@Mike *********
Wait and see. It might be ok. I didn't have to return for HCM - I provided Entry Stamp, stamped receipt from hotel. Did not get asked for more.
In Jakarta, I only provided a stamped hotel letter (addressed to Embassy). They asked for photo of the entry visa and stamps, but the exit was stamped over the entry - so they could see we'd left while they were processing. It was easy for us to go back, and armed a better bet than starting over, but maybe you get lucky.
If they do ask for proof, I suggest including an explanatory letter.