I would call it more of an annoyance then a bug. Normal galaxies this will never really be an issue. However in Infinitum if you log in say once a week and notice half your planets are gone your news feed and fam news could be all blank and have no idea who to retaliate against.
Now if I infiltrate myself I can see news from the begging of time, or the last 50? 100? things that happened. (I just found out this IS possible in test galaxy, RIP 3 agents). This leads me to believe the info has not been flushed from the game… So why is it not visible on news feed or family news?
Again only really a problem in Infinitum or Test galaxies so not a top of the list thing to fix.