Proximity join doesn't work from Teams Desktop app

Hi Pavel Yurevich  I'm a coworker of BroGale and i can share some additional details of this problem. We deployed around 60 collaboration bars and 30 Teams Rooms of different vendors, and our users relying heavily on the proximity join feature in all of these rooms. It stopped working on all computers on all MTRs and Collab Bars at the same time. The issue also happens if i use a non-corporate-pc (bring your own laptop) and on the mobile apps on android and iphone. Bluetooth is clearly working because it detects the room if you search manually a room device:

However, when i join a Live Event in Teams, proximity join is working! It also works when i disable this setting in teams: "Turn on new meeting experience (New meetings and calls will open in separate windows. Requires restarting Teams.)" 

Live Event Producer Join

I think Live events are working because they are still using the old meeting join appearance.

I will send you a full list of all MTRs and Collaboration Bars and the MS Case number of our open Case.

Tested with Teams Desktop App (64bit):

1.3.00.30866 (64-Bit) and 1.3.00.33674 (64-Bit)

Yealink VC210:
Teams Admin Agent1.0.0.202006290446.product
Firmware118.15.0.42
Company Portal App5.0.4927.0
OEM Agent App1.15.0.20110309
Teams App1449/1.0.96.2020102101

Poly Studio X50 and X30:

Teams Admin Agent1.0.0.202006290446.product
Firmware3.2.3.280012
Company Portal App5.0.4927.0
OEM Agent App1.0
Teams App1449/1.0.96.2020102101