Yes I must confess I didn’t think about the App I was using, it was the standard Google photos App so that could be where the issue lies. I will down load VLC and see if that works. It just seemed so hit and miss if it would work or not. It may also the the GoPro Quick app as there is hundreds of people complaining about this software.
I also appreciate using a GoPro has extra setting such as Bit size and 10 bit colour so the overall size of the files may just be too much to Handel.
As you said I struggled to find any thread on the combination of GoPro and FP so I thought it may help someone else out if I started one.
I have resorted to using my laptop solely for editing now, and general download of the cloud at a lower resolution of needed, but I was curious if anyone else has experienced a similar issue. Especially as you can film 4k with the Fairphone I found it all rather odd.
Thanks for the reply though @OldSchool