I've not noted that. I occasionally notice the starbase icon missing on resource starbases when following the AI/auto-pilot moves - I'll see what looks like an unclaimed resource, then when I track it down it is actually in use - seems to be related to the minor races, at least inasmuch as I've never noticed it on a resource belonging to a major race.
But nothing as general as all resource starbase icons missing.
Jonnan
