ETS6 - Issue - Reading multiple group addresses results in an error message

Hi,

I have an issue with reading the actual value of multiple group addresses at the same time.
1. I have the Diagnotics window open and the connection is active.
2. I select multiple group adresses.
3. I right click on one and press read value.
4. An error shows: Value cannot be null Parameter name: parameters.
Restarting the application or PC has no result. I have the same issue across multiple projects. I use ETS 6.0.6 (Build 5030). My colleagues also have this issue and are on the same version.