HR target line shifted and distorted on extended workouts

I’ve noticed whenever I extend my run after the suggested workout finishes that the target line on my HR chart shifts right by several minutes (screenshot: I started the 46min Base run workout at 0:00). Base run workout target lines are simply shifted right; while for Threshold / Anaerobic workouts, not only do the target lines shift right, they also don’t reflect the intervals of the workouts (screenshot: the intervals for the Threshold workout were [10mi wu] [6min @ 162 x3 w/ 2min recovery] [10min cd]. Again, I started the workout at 0:00.

Has anyone else noticed this on their workout summaries?