I just realized that I have actually mastered the ways of the rubber duck debugger with the help of ... stackoverflow.

I just couldn't get my head around a problem thought about it for hours.
Googled for similar solutions, but didn't find anything.

In the end, I decided I'd do something I usually wouldn't and post a question on stackoverflow.

While carefully writing out and explaining my problem, it just made click.

I had it...
It works now...