Hidden unit counters and solo play

So I’m doing a solo play of the Flat Top game module, and the unit counters can be hidden, as it is a hidden movement game.

However, when I switch sides using the Retire button, I can still see the invisible units of the other side same as before (transparent).

It’s already hard enough to solo play a hidden movement game, I’m trying to not have my judgement influenced by seeing enemy hidden units when playing as one side or the other.

Am I missing something? How come units that I turned invisible can still be seen after I switch sides?

I have seen so many issues with switching sides across different modules, I think the feature is just broken. You’re probably better off saving the game and changing your username to reload and play as the second player.