thx ms for the great details, i’m amazed by this value of 26% !!
Sorry, i said something incorrect before : You will not see call drops in your QoS : the disconnect is a normal release, not counted as a drop.
I can’t check right now, but it could be interesting to see what kind of information is contained in the “assignment complete”, or in the “alerting”. Perhaps there is something related to a new feature that was activated not long ago, and that is not understand by either the BSS or the NSS. But really, it’s just a guess.