I'm not sure since when this it's happening, but with VS 2019 16.1 Preview 2 I cannot use this window.
As you can see in the picture, the content of the windows glitches what has beneath.
Currently, I'm running ReSharper 2019.1 EAP 7, but also was happening with Resharper 2018.3.4 when I get loaded into VS 2019 Preview.
Also, I'm not sure if this is only a VS installation issue or anyone else has the same problem.
Please, let me know if I could send you any other log to investigate further.