This is no name confusion bug, the bug is whoever wrote the code simply didn’t consider enabling the functionality for worklets (maybe worklets weren’t even a thing when that particular piece of code came into existence), and the fix is to change WorkerGlobalScope to WorkerOrWorkletGlobalScope.

I don’t write code so that drive-by internet commenters looking at a random snippet always find it unmistakably clear in ten seconds, and I don’t expect anyone else to adhere to that standard.