Double ringing for CQ calls

Hi all,

We have a call queue set up for our two receptionist and it was working fine but the have noticed one small issue when getting calls through CQ.

Sometimes when a call is answered by either one of our receptionists, they get another incoming call seconds later from the same number.

So when another receptionist answered the call again, it shows the message "<..>" inside the blue hexagon in a middle of Teams call. See a picture below.

Does anyone has got a same experience and know what's going on?

Wonder whether it is a Teams error or our Call service provider (duplicating calls maybe?)

Are there any ways to resolve this? It did happen randomly and bit annoyed when it happens.

Thanks,

Damian