RDP audio input cause disconnection on Windows Server 2012 / 2016

I know this problem was discussed in resolved thread, but it is a bit different, please help me, I tried every thing I was able to find about the topic.

On Windows Server 2012 R2: Audio playback works, but the minute I start Sound settings in the "Recording" tab the connection gets disconnected immediately. After that it is impossible to connect to the VM with guacamole, because it keeps disconnecting immediately, the only why is using a RDP client, and closing the Audio settings.

this are the log info:
May 8 10:19:27 ip-172-31-20-3 guacd[14887]: Loading keymap "base"
May 8 10:19:27 ip-172-31-20-3 guacd[14887]: Loading keymap "de-de-qwertz"
May 8 10:19:27 ip-172-31-20-3 guacd[14887]: guacsnd connected.
May 8 10:19:27 ip-172-31-20-3 guacd[14887]: guacdr connected.
May 8 10:19:28 ip-172-31-20-3 guacd[14887]: Connected to RDPDR 1.12 as client 0x0002
May 8 10:19:28 ip-172-31-20-3 guacd[14887]: Ignoring server capability set type=0x0001, length=44
May 8 10:19:28 ip-172-31-20-3 guacd[14887]: Ignoring server capability set type=0x0002, length=8
May 8 10:19:28 ip-172-31-20-3 guacd[14887]: Ignoring server capability set type=0x0003, length=8
May 8 10:19:28 ip-172-31-20-3 guacd[14887]: Ignoring server capability set type=0x0004, length=8
May 8 10:19:28 ip-172-31-20-3 guacd[14887]: Ignoring server capability set type=0x0005, length=8
May 8 10:19:28 ip-172-31-20-3 guacd[14887]: Sending capabilities...
May 8 10:19:28 ip-172-31-20-3 guacd[14887]: Capabilities sent.
May 8 10:19:28 ip-172-31-20-3 guacd[14887]: Client ID confirmed
May 8 10:19:28 ip-172-31-20-3 guacd[14887]: User logged on
May 8 10:19:28 ip-172-31-20-3 guacd[14887]: Sending filesystem
May 8 10:19:28 ip-172-31-20-3 guacd[14887]: Registered device 0 (Guacamole Filesystem)
May 8 10:19:28 ip-172-31-20-3 guacd[14887]: All supported devices sent.
May 8 10:19:28 ip-172-31-20-3 guacd[14887]: Device 0 (Guacamole Filesystem) connected successfully
May 8 10:19:37 ip-172-31-20-3 guacd[1183]: Connection "$70610038-ba7e-4e1d-9103-1b870c0cb079" removed.