Kodi 17 doesn’t seem to keep overscan settings

Hi all and happy new year ,

just a small problem with my new install of Kodi 17 RC2 under Windows 10 Pro (v1607 , up to date)
Actually I ve Nvidia 620 GT with latest drivers 376.48 (in few Days I switch to GTx 1050)
Everything works fine except , after a while or during a reboot, when My TV screen is off , My kodi lost the overscan settings , and my Kodi screen is too big for screen TV ; so I must recalibrate it under settings , display settings , expert mode and adjust overscan in video calibration.
I don’t have the problem under Linux , so I suspect windows to have a sort of reset params.
any ideas ?

thank u very much for help , and have a nice day.

Marc