Since it happens only in VS I guess it is a .net bug, but you know best which component hangs the communication.
Things are much more stable for me now yet I still have other issues that forces me to restart the app for comm to resume 
I hope i’ll be able to find and isolate them
To reproduce, you just need to call CBDB from a ToString() that is called when DataTip tries to resolve the additional information when creating the string to display in the Tip