They now offered me that if I could do another replacement and get a new device if that doesn't work, but since it would still be a Pro 7, that wouldn't help much.
However, I contacted Windows support as well now, and the agent claimed to have sent a report to the Microsoft developers (the real ones in Redmont). I haven't heard back from him, though.
Maybe you could try reporting the issue to business support or your retailer, I'd imagine a report from a company using hundreds of these might get priority over a single consumer complaining. You could also report this to Windows support, if they report an issue present on that many devices, there might actually be a chance of them fixing it. If you do so, please stress over and over again how many devices have that issue.