I just tested it. Prefixes on new posts work fine. I have no idea what you mean about a 350 max limit.
The reason your message was merged with an existing old message was because that old message was still existing and active. There is no reason for everyone to start their own topic for the same problem. That's what the prefixes are for. If you have a Peacock problem, look for the colorful Peacock prefix. If your problem is the same as the one in that thread, add to it. If it is something completely different, start a new topic. There is no need to have 6 topics/threads running for the same problem as we have here now in some cases. Topics should be issue oriented, not based on version numbers. The old topic's title will be adjusted accordingly.
Cats4U
OK, I am sorry for speaking out. 
I don't fully understand it.
Just also frustrated from 6192 on nothing fixed issue.
A fix was attempted in 6193 and now attempted in 6196. Still get same thing.
I know you're experiencing the same thing, so will just let it be.
I can download some stuff from Peacock, so I have that to look at. And SF is the only downloader that even downloads anything from Peacock.
The so-called screen recorder software, only one even attempts to support Peacock, and it don't work there either, in most cases.
I did not know what the 350 max limit meant either, it was something that popped up only once today, and never got it before. If I get it again, will try to take a screenshot of it.