After updating to nougat... my home became blank and if I press back button, black window pops up

[Tahreezz]

After updating to nougat... my home became blank and if I press back button, black window pops up

[JackXperiaP1]

Could u post a picture so that v can see it and advice you. Also there is a malware running in nougat which freezes the home screen and makes the back or home button not to respond. Jus do a factory reset and again install the update to be in safe side 

[LjNj_RC51]

I have the same issue, but only after using Ultra Stamina mode.  When turning Ultra Stamina mode off all my screen icons and widgets are gone and I only see the black backgroud.  After fatory resetting the phone do I see the icons and widgets. 

I'll try to get a pic or post a video on YT.