Incorrect Minimum / Maximum elevation when > 1000m

Hello, I uploaded my gpx traces on nextcloud and on the summary table, the elevation is incorrect for all traces above 1000m. Most of my traces were recorded this summer, in the Alps, around 2000m. But the maximum and minimum elevation is 2m or 1m (if we went below 2000m). But the last trace I recorded is the most interesting, because the maximum elevation is 2m while the minimum is 710m (which is correct by the way). Somehow, it seems there is a conversion problem somewhere and everything above 1000m is converted to km. But while it is great for speed and lengths, it's not interesting for heights and leads to errors.

Also, cumulative elevation gain and loss seem weird, but it can depend on that. And maximum speed is also weird (we were only walking), let's see if it is related.

I can share my gpx files if you need some test files