Problem Run dynamics

Hi

Does anybody have the same problems as I have with the Run dynamics?
In a workout I'm missing some blocks of registration as you can see in the pictures.
-step length
-vertical ratio
-ground contact

I changed the battery from the chest strap but didn't help. Is this a software or hardware problem? ciq.forums.garmin.com/.../1300046.jpg ciq.forums.garmin.com/.../1300047.jpg