Hallo !
After 6 month having dji mavic pro with no problems, I just bought new dji spark combo and after resolving problems with wi fi conections, OTG cables,...
I can now fly, but I have problems with size and orientation of the live view picture. Spark picture on  the screen of my Samsung Note 4 is large only 1/4 of the  screen, and located on its ieft lower quarter and it is oriented upside down and almoust covered with map picture. When I tap on the map I can see it normaly on the whole screen. Recorded video is great and normal. But it is almoust imposible to do framing and correcting exposer because live picture is too small and evenan much worse  oriented upside down.
Can anyone help me please ?? Thanks !!!

Please try to connect with wifi intead of OTG. Did you try  to change a mobile device for check?

I solve the problem. The reason is my phone- Samsung Note 4. On other phone works fine
Thanks for answer!!!