swapping (minecraft) gamemode during a round on a custom map breaks rendering

[MythicDev]

I've built a custom map and it works perfectly fine in wathe:harpy_express_night, but when I try and switch gamemodes while the game is still running, I get teleported upwards (above the roof of the map), and rendering breaks

[MythicDev]

It resets values in the .dat for cardinal components in the map variables changing stuff and breaks everything