T95Z PLUS and Kodi 17 Resolution issue PLEASE HELP

I previously posted and it was removed, it was because i bought this box and it was preloaded and i wasn’t aware silent hunter was illegal i have since removed kodi and Reinstalled krypton.
I have a T95Z Plus box with kodi 17, and im using a 4k TV with HDR, the resolution on the box is set to 4k at 60hz and displays Netflix in 4k yet when Kodi boots up the resolution is set to 1080p at 60hz and the option to change this is greyed out, please help when it was on kodi 16 the resolution was 4k now on 17 its stuck to 1080p
Please help