Yeah, this is an issue with some block explorers.
Bisq uses OP_RETURN values in trade transactions, that some explorers can’t read correctly. Bitaps is one of the explorers that shows this message correctly instead of an error.
Your transaction is indeed not confirmed, maybe due some fee estimation issue, such as a sudden spike in mining fees or something.
It should resolve itself naturally once it gets confirmed.
In Bisq the deposit is a multisig address, and most explorers aren’t able to read multisig address, hence the error message.
Your tx was also done with low fees, and yesterday the average fee was higher than usual (over 20 s/B), which may explain some time necessary to be processed.