Credential List empty (Not connected) on first try

Hi folks!

A colleague of mine reports that when he opens an RDP session with Open (Select Credentials)... sometimes the Credential List is empty and says Not connected on the first try. All further tries then show a populated Credential List.

Unfortunately he is not able to reproduce the issue. The issue shows up randomly (it seems).

This happens with RDM version 2019.1.38.0 64-bit but also happened before the update.

Any ideas how to track down this one? Thanks for your help!