Bug Report: Custom songs using any of the Erect stages cause various errors and fails to load the stage

Issue Checklist

[X] I have properly named the issue
[X] I have checked the issues/discussions pages to see if the issue has been previously reported

What platform are you using?

Itch.io (Downloadable Build) - Windows

If you are playing on a browser, which one are you using?

None

Version

0.5.0

Context (Provide images, videos, etc.)

This issue does not occur if the song is loaded by Chart Editor, meaning you need to play said custom songs by implementing them into the game with mods.

(Perhaps related: Vocals also cease function when the bug is encountered...? This uses a single vocal track, instead of the new split track system)

Steps to reproduce (or crash logs, errors, etc.)

No response

FunkinCrew / Funkin