Games pause mid-way

I am running CM7 on the Nook Color. Recently, I starting seeing a strange behavior. Many games will go into pause mode without any action from me. Plants vs Zoombies, Peggle and today Swamp Defense. They all run full screen.

I am not getting Force Closed, the game simply goes to Pause or restarts.

Should I Reflash the ROM?

Thanks

 

I am running 7-05252011-NIGHTLY-encore from the internal memory. I know, I need to update, I think this is way too old.

I actually found the problem. There was a bluethooth process that once I killed it, everything started to run normally again.

Thanks.