The only issue I had was because I was stupid. There are 2 pages in the PDF. One for each coin. I used QR 4 from the wrong coin 5 times before I realized it.
and I thought that I'm the only one who did it like that several times

That happened to me too

I was excited to try it out and accidently scanned the wrong code a few times. And after that the network was congested and could not redeem coins on first try
