Yes, sometimes. I remember having to wait about 3-4hrs for confirmation on a blockchain to coinbase transaction last month. Funny enough, during the wait period I was silently praying my coins weren't lost lol
Not to worry in case when you make payment and waiting for confirmations.
Because already on explorer transaction is showing on ledger. But for completion of transaction it needs at least 2 confirmations.
As block mining will finished your amount of transaction will verified and credited to wallet address.