Panning Automation Problem

My Front to Rear Panning timing is off. I programmed the sound to go from back to front over 14 measures. Then it’s to return to it’s starting point over the next 14 measures. Instead it’s moving double time, arriving at the front by measure 7 and waiting the next 7 bars before starting back. Then it arrives in 7 measures and waits the next 7.

I’ve never seen the timing not match correctly before. It should be moving slowly enough to arrive at measure 14 evenly over the course of travel.

Anyone have an idea how to correct this?