Noticed today when i went to attack the last planet of a particular faction - I sent my large fleet ammassed at my nearest planet in.
When they arrived and had finished dropping out of hyperspace and started attacking the enermy, i noticed more ships where still arriving for a very extended time ( all forms) - had a look at my other planets and bases and for some reason all of my other ships at all my other bases and planets had mysteriously decided to make there way to the battle ?????

So my fleet doubled in size by itself - very strange - BTW i won and returned most of the fleet to there original planets.

Seem to me to be bug of some sort where for some reason all of my ships automatically made there way from all over the place to this battle.
When they had finished hyperspacing in the only ships i had left at any other base was the ones that had just finished being constructed - they didnt hype in.

Very weird its only happened to me this once .