Unless 3 transactions are being processed, I can’t start the fourth one

I made transactions for different amounts one after another. The first three are processed normally, but the fourth does not appear in the order history, however, after confirming the transaction on wallet, a notification appears that the transaction has been accepted

Stacks address:ST2KCKTVVD6XNM1HHPJCBTNQYPM80Q7H8K3QCSJBJ