No Connections shown in Server Manager after 2x update

Hello,

we have following problem in one of our remote desktop farms:

Environment:
All Servers are 2012 R2
1x Microsoft RD Connection Broker with installed 2X Application Server v14
3x Session Host

This config is now running for about 6 Month now "without" problems.
Last week i've updated the 2x Application Server to version 14.1.

Now i have the Problem that i can't see any connected sessions in the connection list in the Server Manager. -> See Attachment.
I've unchecked the option "Disable Microsoft RD Connection Broker" because we want to use both.
2x to LoadBalancing and the Microsoft Broker to administrate the Collections and Connections.

Do you now this problem or do you need any further informations?
Thanks!

Stefan