Thank you for your reply.
Date on the top of the page is "Daten vom 2020-01-21"
This is always the first what I do when I open the ProfileStats page: to look whether it's the today's day.
The problem (distance shown is ok, but cache indicated is wrong) exists since two days.
This is the status:
Furthest cache found: 9,594.57 km, TAKE OFF TO THE RAINBOW’S END, GC1YTJ2