Record a freeform loop. This has established the loop unit size.
Record on a new track. Obviously there are no beat or measure markers in free form mode. But there is a loop size as established by the first loop. When recording that first loop on a second track, we know that second track loop length is going to be a multiple of the first track length.
But as we approach that length there is no visual feedback. We can’t rely on the red line in the first track because the second track start point could have been anywhere.
Feature request: a line to show loop unit length when recording secondary tracks in freeform sync to length mode. Suggest thick white for consistency with non-freeform mode, but I don’t really have strong preference.