Continuous loop of print paused for insert filament

#1
I'm not sure if I have a bad filament sensor on my Gmax2. My print paused during middle of job for "Print Paused, Insert filament and press button to continue". I feed the filament, purge, and continue and it either immediately stops or does 1 or 2 passes and then stops. The machine backfeeds the filament and gives the "Print Paused" notice again. I do it again and same thing happens. Started the job fresh again and now it immediately stops with the same occurrence. Made sure the filament has plenty of slack. Any help would be appreciated.
 

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#2
I figured it out. As I'm a newb and didn't set up this machine, when my filament had broke, I was feeding it directly into the extruder and bypassing the filament sensor at the top. Thx