We need a moderator to merge threads on this and stop the 10 minute edit limit.
This is a significant tech issue that is evolving. Some cars have it, some do not, but I bet all cars CAN be induced into Blank Screen Mode. It no longer appears to be hardware, and certainly 'fast boot' aggravates this situation. Read threads about slow booting the car for a temp patch.
To the OP, rest assured that dozens or hundreds of owners are trying to isolate this, and have come up with some tricks to improve stability.
This is NOT a Jaguar Land Rover owned site. We are all unpaid car enthusiasts, mostly Jaguar i-Pace owners or those interested in them.