Question Shader Graph unusable in 2020.2 HDRP 10 "Internal: deleting an allocation" warning spam

Just installed 2020.2 and checking out the HDRP example project.

When creating a new shader graph (HDRP Unlit) as soon as ShaderGraph is opened and the window has focus, the console spams "Internal: deleting an allocation that is older than its permitted lifetime of 4 frames (age = 5)"

This slows down editor performance and panning in shader graph is choppy.

Then if Unity loses focus and I click back onto the editor the "Hold on..." window pops up waiting for ConsoleWindow.OnGUI.repaint
It has been waiting for 10 minutes now and seems deadlocked.

Has anyone else been getting this?

*EDIT* determined it is caused by enabling the Graphics Compositor feature, specifically when no Game or Scene view is visible (fullscreen shadergraph), reporting a bug