TOPIC: ship depot herassment

Im kind of ticket off right now. In more than one game I got back after being afk for a longer period, that all my harbors were cut off for my ships with ship depots. Is there something we can do about this? For instance a max amount of ship depots? I get really sad after a lot of work, that I come back and got fucked over like this.

ALso, it takes forever to recover from this. I was at 35,000k p/m income, and it got cut down to 5,000 p/m because of the herassing, so it's a big problem.