Changes in the latest dev branch appear to have solved the original issue, however there is now a (previously nonexistent) intermittent issue where a player's spawn point (i.e. a spawnpoint linked to a player) will become unavailable despite the player being alive. Was unable to determine a specific reproducible reason for this...

Thanks for getting back to me on this, there are however still respawn points remaining (the static respawn position) after both players are dead. I managed to "solve" the issue by making one of the players invincible (this allowDamage false) while the other is dead, however this is obviously not the ideal solution.

Will test on the latest dev branch version and let you know if it's fixed. Thanks for addressing the issue :)

They already have a Head Forward/Backward axis (along with horizontal and vertical movement) available from TOH, would be nice if it was enabled in the ArmA 3 helis though.