On the adjustments phase you can clearly see a Brown transport in the Bay of Biscay. This transport is supposed to retreat back to the North Atlantic, but after the adjustments the transport disappears. It never makes it to the North Atlantic and is gone from the map. I will not advance the turn so the issue can be looked into.

Bermuda triangle?

Thank you for reporting. We see it. That is a weird one.
Possible display issue. It retreated fine, but was destroyed by the sub in the new sea zone. Checking into it further, please continue to hold the game.

This was a good one. Thank you for finding it.
It would only happen if the retreating force was killed in the same turn.
It is now fixed for future turns. Existing ones will not be changed.
Everyone should refresh their browser so they have the new version of the client.

So the transport does move, but I can't see it move, and then it is sunk, but I don't see it get sunk?

P.S. I like the solo WWII game option for premium/extreme members. It is a nice change of pace

It is fixed now (for future turns), but yes, that is what happens.