Lucio Ball Competitive Group Issue

My friends and I want to three stack in Lucio ball comp but we aren’t able to for some reason even though we can queue for regular comp.

There’s other threads reporting this as well:

Hoping that one of them gets Blizzard to notice this issue.

Here’s my information:
The same is happening to my friends and I as well.

Copa Season 1 end scores:
Me: 4003
Friend 1: 4005
Friend 2: 3925
Friend 3: 3624

If Me, Friend 2, and Friend 3 group up it denies.
If Friend 2, and Friend 3 group up it allows.
If Me and Friend 1 group up it denies.
If Me and Friend 3 group up it denies.
If Me and Friend 2 group up it denies.

We can’t figure out what could be causing this. All of us also have not played Normal Competitive mode in a couple seasons, so it’s not like last year’s bug where it’s related to the present season rank. Additionally, we are able to play normal Overwatch Competitive mode as a group, but not Copa Lucioball. All friends are last diamond rank in Competitive OW (3000SR due to degredation), and my last SR in it was Gold (2156).

I hope they resolve this soon as I feel having restrictions placed on a game mode by a completely different game mode is a valid bug that should be resolved and also does not provide enough information to resolve the issue from the user standpoint