[FTC]: [UNSOLVED] Autonomous Doesn't Run In FCS

[coollog]

Greetings from Team 5485!
We recently participated in the Hudson Valley FTC Championship and were having some problems getting our autonomous programs to run while connected to the FCS. The weird thing is that the autonomous runs fine when the robot is connected by itself to the FCS, but never gets past the Wait For Start when other robots are connected (meaning that our autonomous never ran in competition, but always worked in practice).
This problem never happened in a previous competition we attended at Penn State York. A referee at the Hudson Valley Championship suggested it might be a problem with our NXT, as it also sometimes froze during competition (though other teams' NXT's froze as well).
Is there any other reason this weird problem is happening?