Even though the Devs created a temporary fix for the Ship losses (hopefully which might come this weekend), we encourage you to spread a bit and not hord your stuff only in Peacekeeper 4. Originally this Orbit was only supposed to be to fly through and not to stay. Most of the losses are due to that orbit.
Therefore please move your ships into the other Peacekeeper Orbits (which are quite empty) so that the Orbit gets stable again.