This is for Android users but may be helpful for iphone users as well. I was having the exact same issue. It seems as if there is a problem when the Google app is set to a different mode than your Android system. Go into phone setting and hit the search icon. Search for Dark mode. This will bring you to where you can set your actual phones light or dark mode... This is not the Google app mode. In the Google app, go to settings, general, and theme and make sure it's either the same as your phone or set to system default while your phone is set to light mode. It seems to have a problem when the two differ.