Lyonheart, it's game related.

I can't even get ISboxer to work on my end and I was having this problem with follow player while playing on two separate computers without ISBoxer and again when my wife got home and was trying to follow my character or I was trying to follow hers.

Someone else on server asked about the issue as well on general chat last night. There's also a short thread about it on SWTOR forums. My luck in playing two characters in this game hasn't been very good.