buttplug-tampermonkey-ui may fail to do anything if the page finishes loading before the script runs

[Baguettedood]

If the page finishes loading, buttplug-tampermonkey-ui will not do anything. When the script runs, it adds an event listener to the "load" event, but by the time the script has run, the event has already fired, so it will fail to do anything.

This may affect some webpages but not others. Replicating this is somewhat annoying since it's inconsistent. Seems to work best if the browser is under heavy CPU load from lots of tabs?

A Stack Overflow question had similar problems and should help find a solution.

[Baguettedood]

Can be mitigated by setting @run-at document-end in my userscript.