minecraft:load tag does not run on map load

On opening a world, functions appear to be reloaded, but the minecraft:load tag is not called.

This would be very useful for very specific situations in which the stat minecraft.custom:minecraft.leave_game does not activate (e.g. game crashes), as it is the only way to detect the map reloading.

Alternatively, a minecraft.custom:minecraft.join_game stat would be great, and far easier!