mw3 aizombies servers not working

[SimplifyTheGrind]

I am new to plutonium and started playing the mw3 aizombies servers. After about 3 days of playing on them they all stopped working and put you in spectator mode. Once I select the server and I'm put into spectator I can't leave the server I'm stuck unless I force end plutonium task and select a different server once I start it back up. I was wondering if anyone has any information regarding this. Is this a bug, is the server host working on an update. I was really enjoying the experience and bummed it cut out regardless of why. from what I gathered there was a post from like 1-2 years ago when the servers initially went live and it stated that the mode is supposed to be ran in tdm and I noticed the servers are set to ffa. But the host of the server hasn't been online at least on the main server host's account Slvr99 hasn't been on in about 8-9 months. If there was a server update would the host have to come online regarding plutonium? I would appreciate any information or advice regarding this.