Anyone had this metamask card transaction error message and know what it entails

Hi all

I made a purchase using metamask card using GBPe. It debited the amount from the account but then gave this error message

"Your transaction was declined due to slow block finality. Your LINEA wallet was debited and the funds are available from your credit balance".

It credited me USDC which is a ball ache when due to fees I can only transact in GBPe with card. Im not excited by having to bridge it back to gnosis chain and swap it back to GBPe to then bridge it back to Linea.

I'm keen to understand this error message better so I can avoid it in future. Has the merchant declined it or is it a blockchain issue, if so what determines when this blockchain issue occurs?

Thanks