Freeman just have shared his previously mentioned 4.24 update for steam audio plugin: https://github.com/EpicGames/UnrealEngine/pull/6203
Looks like they have decided to go with engine source change for level reload support, and their solution seems better because of it also introducing proper support for level reloads on audio plugins.
I’m going to give a quick try to his PR and see if everything works.
Edit: There was a bug preventing me from exporting scene, it’s suggested as a change in PR now. Rest works without problem, and better than my initial implementation. They did lots of fixes onto my PR.