EAS changes channel to C-SPAN with no emergency alert announced

Every time there is an EAS, the channel changes on it's own to C-SPAN. Its stuck on that channel for about 30 seconds then changes back to what I was watching on it's own. No Alert Message is ever played.

I wouldn't even know its supposed to be an alert if it wasn't for the cable box saying EAS on the front of it.

Surely something is messed up?