Home screen displaying last app/webpage as background?

[AC Question]

Hi, I have a HTC desire 530, on Android Marshmallow. For some reason my home screen background shows the most recent app/webpage as the background, rather than a set background. I did a factory reset on this, and it still has this issue. Does anyone know if there is a setting to stop this from happening?

 

[B. Diddy]

Welcome to Android Central! Does this also happen in Safe Mode? https://support.t-mobile.com/docs/DOC-28223