GX450 stops communicating

We are utilizing several of the GX450’s for communications on a private Verizon network. We have two that will periodically stop communicating and have to cycle power to them. The strange part is, all the lights on the unit are green and make it look like the unit is working, but no data will pass through them, we can’t ping in or out until they are reset. The only hint that I have found is in a log file after rebooting there is a line that says something about resetting bad container ‘config11.smc’ Any ideas what could be causing these lock ups? We have several other units that work without a hitch.