Wrong elevation on imported gpx

Hi everyone,

I am a happy new owner of a Fenix 7X. I have tried to test the PacePro feature on an imported GPX file (downloadable when clicking on the "Exportovat" button on Mapy.cz link). In the original Mapy.cz source and in the Online gpx editor I can see this rather significant steep second hill. But it's not present on the Garmin Connect import so I am afraid the PacePro instruction are rather useless in this case. 

What is the reason for Garmin connect to ignore the elevation? Is there way to fix it somehow?

Thanks.