Zgemma with hisili chipset model H9 Combo dont working HbbTV good on the some channels DVB-T2 Czechia

OpenATV images for Hisili using QT browser Zgemma there is problem with HbbTV

Images which are using WEBKIT web browser , there is working HbbTV OK like Octagon 8008 hisili

Why Image for Zgemma H9 combo etc dont using WEBKIT ?

Thanks