i had a problem with a type IXC on my last campaign that was so annoying i abandoned it and satarted over.
I went to reload from external stores to internal stores and the topedo screen started flickering, then the external spot became greyed out as if there was nothing in it at all without loading my internal storage. I reloaded from a previous save point and it happened again in a different torp location, restarting the mission did not help either as it happened again.