I'm using the latest test version of Awesome Mod and the only problem I've had has been when the time portal appears and my sim inspects it. My sim inspected it for most of the day in sim time and I couldn't cancel the action either. I had to use the resetsim cheat in order to break the loop.
This issue is not related to AM - I have the same without AW installed (using "only" Twallan's mods at the moment)
That could be related to the high tech skill. I experienced it myself and I also have read some reports about it and it seems a Sim with a high tech level greater 2 can't inspect the timeportal. I guess the Eaxis devs assumed that only Sims who have never been to the future and therefore have a high tech level of 0 inspect the time portal.
Thanks to both of you. So if I go by this then I can up my sims high tech skill past 2 then they will be able to use the portal without getting stuck in that loop?