After you file

Hi all. I have been reading the comments about HSA distribution and more confused now. 
So, I got treated by my dentist and paid by HSA like always because they are not in the network and I was not expected to get paid from insurance. Time goes by and 6 months later they told me that they got my insurance money, which I was surprised. I learned that they submitted claim but very late.  Due too Covid I didn't leave money at the dentist and ask them to credit back my HSA account. Did I do something wrong? How to handle the situation?  Thanks.