There's various reasons why a peer could be automatically banned from being connected to you temporarily.

Perhaps your node thinks that they are doing something outside of the consensus rules, or attempt and then fail to do something too many times or are on a different chain.

Usually the ban on a peer lasts for a day. If you want to figure out the exact reason why, you could check your data folder's debug.log.

It is rare to see banned peers however so check that the current block number, or block height of that wallet is the same as in your other wallet or the block explorer.