"Resume later" - stops tracking distance but GPS is fine.

On two occasions now, when pausing a hike and selecting "resume later", when I resume the workout the distance doesn't seem to increase above what was recorded before the pause. The GPS trace is absolutely fine, the heart rate and pace seems to be tracked, but distance isn't.

Extra note, on both of these hikes I was following a Course using the Navigation menu, and I paused for more than 30 mins / 1 hr each time.

Is anyone able to offer a fix for this as it's extremely frustrating?!

Thanks you.