Yes, it has happened to me in the exactly the same way you describe it Arrons1977, in my last 3 Alt Shot matches.
I tried logging out and then back in but without success. What I find really annoying is, it times ME out and says I haven't returned in turn and I lose the match, which of course could affect my 'completion rate' - very unfair.
I sent a message to WGT outlining this problem a couple of days ago but not had a reply yet.
JW