When flying my P4 with the Go4 app, I get a lot of this going on, on screen:-

1

It doesnt show on the recorded material from the card but does show on the material recorded to the device.
It is very disconcerting when you are flying and you loose your vision like this. Can it be sorted?
P4, Go4, Samsung tab s 8.4

My P4 also did this no matter which (cheap) device I tried to use.  And no, DJI, I'm not spending $400+ for a new tablet "just to see if it helps".  Decreasing the video transmission rate to the minimum 4 MB/s helped a bit.  Using the older GO app worked even better.  (I hear they have now taken that v3 ability away from us!) Still though, no matter what I did, I was never able to get the video working decently enough for FPV use.  The video was still way to laggy to use, and the video would just crash altogether after several minutes of flying.

I have switched to using Litchi and now I have very few issues, except the framerate still isn't good enough for maneuvering in close quarters.  It works well enough for my purposes.