Loading Screen does not display after first appearance

[jelster]

Describe the bug
Despite log messages indicating the loading screen is being shown/hidden, the screen is never rendered. It can clearly be seen underneath the Driving screen when that screen throws an error. Inspector and browser profiling also indicate that the loading scene's TrailMeshes are taking up large CPU intra-frame times when they shouldn't be getting updated at all.

Additional context
potentially need to add logic to the loading screen's showLoadingUI and hideLoadingUI functions to add/remove the render loop for the screen at the same time