Cold War ps5 won't find lobbies once in party?

I have a problem that e.g. When I gamble alone I can find lobbies without any problems, but when I go to a party we don't find any more lobbies. It just searches for hours without us eventually entering a lobby. But alone it works fine for both of them with the lobbies. Is anyone having the same problem? Does anyone have any possible solution?

Well that's probably DrecksBMM if your KDs and levels are very different.

But it worked flawlessly a few weeks ago, then we had a short break and now nothing works.