ViewDistance OnFlying won't increase

[TomLewis]

I have set OnFlying ViewDistance (10) to be more than the ViewDistance Max (6) so I can give /fly to people so they can take screenshots, but its not increasing, I assume as it can't be more than the max? but I don't want everyone to have more than 6 max! I just want to increase the fly render distance when people are put into fly. For now I have got around this by using the override permission in a rank that I can temp-set instead, but it would be nice to have the fly functionality. Im using essentailsX for fly (If this makes a difference)

I am using Paper version git-Paper-1596 (MC: 1.12.2)
with BestViewDistance 11.9

Config:
https://gist.github.com/FrozenBeard/b70e663eb70a1e68f7bb48f4776074c7