Strange behaviour on X-H1 when filming slo-mo HELP!

[WillsM]

Hey guys / gals,

First post on here.

I've had an x-h1 for a couple of years and it has been an amazing camera.

I recently started using its video functions, specifically the high speed 120fps functionality. Blown away by its crisp video.

So I decided I wanted an external monitor, to make things a bit easier. I got hold hold of a smallHD focus 5" monitor, runs off the HDMI output and has its own power source.

So everything was okay. The monitor is great. I have found a really odd bug though and I am wondering if anyone else might have come across this and has any thoughts / solutions.

High speed shooting has  number of different modes, some at 120p, some at 100p. When I connect the monitor and select "EVF" only view using the display button on the right side of the viewfinder, then start recording at a mode which uses 120p, after about 9 - 20 seconds I get an error thrown in the display screen, showing "write error".

So if I connect a different monitor through the hdmi out, the problem is still there, so i know it is not the monitor that is the issue.

If I do not connect the external monitor, the problem never occurs.

I have raised a support ticket with fujifim, and they are looking into it, however I was wondering if anyone else has experienced issues like this? I am using 2 UHS 3 sony memory cards, brand new. Also have swapped them around in the slots. Run a health check on them also. I do not believe it to be a memory card issue at this time.

What is strange is that there seem to be 3 variables at play:

1. The output 120/100p in the high speed recording mode

2. The display mode being set to "EVF only".

3. An external monitor being plugged in

The reason I am setting the mode to EVF only, is to stop the camera from outputting the live picture to the LCD screen when I am filming. I am doing this to conserve battery life on the camera.

So it would seem that "EVF" mode + 120fps + an external montior = write error to the SD card. When the error occurs, the recording quits and this keeps happening unless I switch the mode to use the LCD screen OR i switch the mode to 100p OR i disconnect the external monitor! Bonkers right?!?!?!?!

Anyone had similar issues? Could it be the write speed on my SD cards? I am using sony M UHS 3 write speed 100MB/s, so can't see them underperfoming!

HELP!! I's doing my head in!