Brick when I close the keyboard topic

I use this rom for a week: ROM: cm-11-20140308-SNAPSHOT-M4

Today, three times my Relay is crashed.
When I close the physical keyboard, the smartphone is turned off and will not turn anymore. It is bricked!!
Coincidentally I found that by opening and closing the keyboard works and I can go on.
In the last case, smartphone would not turn over and I've unmount. I've reassembled and the smartphone is turned on again.
What can I do? it is the fault of the rom?

thanks for the answers