Processing Refund disappeared (HELP)

Hello I hope someone could help me on this idk whats going on and I’m starting to panic a little

I bought something from mercari online. When the seller gave me the wrong item I asked mercari for a refund. They are currently processing the refund. Saw it the other day that it was processing but when I log into bank of America today and saw it gone I got confused

Theres another refund that Im waiting on too it was processing but disappeared too

Can someone please explain to me what’s going on. I’m scared because I have no screen shot of the refund processing appearing but I’m 100% it was in my transaction history a few days ago.