tomtom go android 10 inch

hello,
i am new here on this forum.
my name is ivo,
i have a question about tomtom go app for android.
having a aftermarket android radio i like to navigate with tomtom go app.
the radio has a 10 inch screen.
the app loads fine and is runs ok but when i navigate only the road ahead is showing on screen the sideroads are not on screen.
is this a problem with the 10 inch or does somebody what is going wrong and has this problem to and know a solution?
greeting

Moved to Android section...

I have the same problem.
The second one, I cannot put an hold the sound to 100 % ... it came always back to 25% when returning to the map screen.
Help very appreciated.
Thx.