Hi avocado,
I apologise for calling you a liar. I should have kept my cool and simply describe the situation from my side. The problem with missing messages is being addressed by the developers and is already solved to a large extent.
I would like to say that Bisq is a trustless and reputationless system and is thus much harder to protect against scams compared with other systems. It is necessary for arbitrators to be especially careful if there is a mismatch between names and account numbers, since such problems will occur for certain scams. Our number one priority is to make Bisq safe and reliable, even if it takes extra time and effort in arbitration. Fortunately it has turned out that the number of scams (or attempts) on Bisq are exceedingly rare. Bisq works as intended.