Side question: Is there an intentional reason why KODi itself did not get a update in libreELEC master since ~1 month? (Just curious)
Yes, LE master will be updated when Kodi master bumps to 17alpha3 or 17beta1 or whatever their next tagged version is - LE is tracking only the tagged releases. If you want bleeding edge Kodi master in LE master you'll need to take matters into your own hands.