Power sliding door not working properly

The passenger side sliding door will close smoothly until about 2/3 way then start stuttering. Most time it's will still close but sometimes it just stops and reverses back open again.

The driver side sliding door also sometimes will stop closing and reverse back open, but it moves smoothly with no stutter at all.

Both doors will close eventually after 1-3 more tries.

I know these doors are supposed to stop closing and reverse back open again if something is obstructing it, but there is nothing in the way that I can see. I tried looking in the door tracks, but they seem clean nothing that would cause them to trigger the safety stop.