In ship design change the strategy of all ships which are don't get hurt to capture planet. If they carry no cargo and have no weapons then it should not affect their behavior in strategic. If they carry weapons then they might come in harms way though. Furthermore even if they can carry cargo it will not affect them unless they have troops, which changes only attacks on planets, not warp points. I was just looking at the strategies file a couple of days ago and comparing to AI design creation.

This is a temporary fix. If it works then never use don't get hurt, and change the design file. As a player change the ship strategy when you do a new design. I am sure this don't get hurt flaw is well understood and left unfixed due to a lack of sufficient complaints. You DO HAVE a don't get hurt ship in the fleet, don't you ?