Bug With Battle Location Icons
The battle location icons usually vanish after several turns. Sometimes they don't, then they stay forever. I've found what causes this and a way to reproduce it. The save that is needed to show this available here.
Load the save "1 01 343914b Battle Icon Bug". You will start at Thea, and there is a probe nearby. There are space monsters very close, so follow instructions carefully. There is nothing to do, so go to the next turn. A space monster will destroy the probe, which generates a battle notification icon at the spot.
When it is your turn, move Thea 5 tiles to the northwest to keep it safe. Pass the rest of its turns, then go to the next turn.
Choose a tech. Move Thea to the southeast to get it close to several monsters. Pass any turns it has left, then go to the next turn.
The space monsters will destroy Thea, and now there are two battle notification icons. Go to the next turn.
The first battle notification icon will vanish like it should. Save the game - quick save is quickest. Go to the next turn.
The second notification is still there, so go to the next turn.
The second notification will vanish like it should.
Everything is normal, so where is the bug?
Load the save you you made a few steps earlier. You will be at Earth. Move up to where the battles with the monsters occurred. The second notification is back because the save was made before it vanished. Go to the next turn, then the next, then the next and continue until it vanishes. HINT: it will never vanish.
The bug is that battle notifications that exist when a save is made will never vanish after the save is loaded. They still work, but they just hang around cluttering up the galaxy.