CFBG system is not working properly

Description:

FIRST ISSUE IS : cfbg after compilation looks like it works properly, but ingame when you run the battleground, it connects all players to one team and the other team is empty. (for example 2 alliance players join bg and 2 horde players join bg, now who first clicks on enter battleground, if horde player changes it to alliance player and puts it in the team alliance, then all players put it in the alliance team, if he gives the first enter battleground alliance player, then it turns him into a horde player and everyone is in the horde team.
SECOND ISSUE IS : when the battleground starts, it can no longer be joined, it does not send an invitation to the ongoing battleground.

Current behaviour:

no crash nothing happens, everything looks like it works well.

Expected behaviour:

cfbg should work as a balance system, it should assign one player to one team, another to another team, and gradually fill bg to full. and you should definitely join the ongoing battleground.

Steps to reproduce the problem:

1. Compile Core
2. Set up min players for battleground start in my case 4 players for WSG
3. Run Server
4. Create 6 Accounts
5. Log ingame and Join WSG battleground
6. Enter the battleground and check the system as the player connects

Branch(es):

Writing server debug on console will return the best results for reporting bugs (3.3.5a for now)
3.3.5, CFBG or both

TC rev. hash/commit:

TrinityCore rev. 2302a5bc4451+ 2021-08-30 00:48:59 +0000 (master branch) (Win64, RelWithDebInfo, Static)

TDB version: TDB 335.21081

Operating system: Win64

Start by reproducing the CFBG behavior with the stated four-player WSG setup, six accounts, and server debug output, focusing on the battleground entry flow. Done means players are assigned to both teams as they enter and invitations can still be sent after the battleground starts.