Transposh bug with permalinks

Hi,
when i try to translate my website in russian i have problems with permalinks. Infact if i try to open a subpage from the main submenu it redirects, wrongly, to the home page.
How to fix?
Try by yourself:
https://www.kolpingdomitilla.it/ru/ and go to the main menu HOMEPA, then choose a subpage. You will see that you will go to the home page and not to the linked page…
On the other languages works perfectly, only in russian. Any ideas?

The page I need help with: [log in to see the link]