A duplicant in a jet suit can get into a loop where two identical length paths are "better than each other" and the dupe will rapidly switch between them without being able to take a single step. This "dance" will continue for as long as the paths are of identical length, which can spontaneously stop being true due to dupe going a bit too far in one direction.
I managed to capture it in a save, but since jobs are not saved, it may take a moment to happen. The attached save has a construction job on yellow alert - this job pretty reliably gets this bug. May not be 100% reliable, but I tested it a few times and it happened every time.
I'm pretty sure this bug existed many versions ago, then I stopped seeing it happening, but now it's back.
Load attached save, track the dupe that will do the yellow alert job