We are playing with In The Presence Of The Enemy rules, because of this I made an stupid move (didnt remember we were using it) and reached only box 1 with my fleet at the Faroes.
There was a combat and I had to return to base the aborted in combat and then the ones aborted by me after the beating I got.
There was a fleet at the North sea, they tried to intercept, couldnt do in the first case but made it in the second, when I was returning with my 3 remaining CRs, all of them 5-5. I enclose image.
Then I was offered by the game to go up to the 3 box while returning to base. I remembered in my board WIFs I had gone up some levels when I had mobility left, and had been intercepted, so I took 3 box. The game then, instead of fighting through the 3 box, passed immediately to Strat Bomb Cap phase and those ships staid at sea.

I suddenly thought that with 5 movement points maybe you couldnt do that, there would not be enough if you were going for a next sea, because then you`d need to go down the 3 boxes to continue, but I was not going to another sea, so I checked the rules (RaW) and saw that you need to go through the 0 box when aborting or RTB end of turn. So that was a bug, unless a deviation.
We tried several times and could not solve it. Then, in despair, I run it solitaire, the box allowed was only 0 box, and no bug happened.
The capture is taken in the Solo game, I enclose it so that the intervening units can be identified.
Netplay bug.