Ok, since Germania can't try peacock, and I am lucky enough to get it through Xfinity, I tried Chicago P.D. S10E16.
It went fine with NO issues. So #1, I would try whatever Germania might suggest. #2, I noted in the past via Cats4U posting about Peacock that if I remember right it's suggested to have the download queue empty and do Peacock separately. Or I think if you do have things in the queue, at the very least, do Peacock first, as at times otherwise, it would cause issues.
I very rarely download from multiple providers in one go. I queue up Amazon let them go, then if I need Netflix, queue them up let them go, and so forth.
In all reality, you should be able to cue 2,3, or even way more providers all at once, but it's worth a try with Peacock to do it separately as I said I tried episodes 16 and then picked episode 10 just randomly to see, both worked with no issue.
Unfortunately, the last word from Cats4U is they are recovering and most likely not on the forum much, or I am sure would chime in their thoughts on Peacock.
Maybe if I get a chance I will queue up a few Amazon, Netflix, and the same Peacock shows all at once to see if there is an issue.