black screen when swithing to tablet mode

[waves1]

I use the whiteboard in teaching, everything was fine but suddenly a problem appears, whenever I switch to tablet mode and start writing, a black screen flashes then the screen totally changed into black and I lose the control and I can not do anything but turning off the device by pressing on the power button for a long time.  I tried to re-install Microsoft whiteboard but nothing changes  . I bought an Ipad so I can use the whiteboard easily. but still, I want a solution.

[WAWood]

@waves1 

Sorry, but we are not in any position to diagnose or solve issues with Microsoft applications.

For problems with those, you have to contact Microsoft Support.

[waves1]

but the problem continues and occurs whenever I switch to tablet mode in any application or browser