It's strange that I've had a completely different experience for the last forty years. I have never had to readjust them because they don't move. I prefer them to "premium adjusters" because they're not so easily damaged.

They're not really adjusters, they're spacers. Putting them all the way back positions the wheel perfectly in Simplex dropouts. The is absolutely no tendency for them to move forward. It's the same for the Suntour dropouts on my Japanese Peugeot.

They may not work well in stamped dropouts. I've never tried.

I've never had a QR contact them. Not even close.