I am having this same issue in the official 2.8 release. I can't seem to reliably replicate it though.
Fri, Aug 23
Jun 1 2019
May 27 2019
Never mind, I'm just really blind. I'm used to it in 2.79 being on the left side, and not only did it move to the right side, but the default background color is almost the same color as the node so it didn't look like it was there. Sorry
May 26 2019
May 7 2019
Ok, after doing "blender --factory-startup" and enabling addons one by one, it seems like a bug with Animation Nodes. What was throwing me off was something very similar to this happened before I installed Animation Nodes, so I didn't think of checking it this time.
May 6 2019
Here is a smaller version of the file, but after experimenting I don't think it will help all that much.
May 4 2019
Apr 19 2019
Jan 14 2019
Jan 8 2019
I found a setting in the preferences "General > OpenGL > Selection > Enable OpenGL Depth Picking" that seems to resolve this issue. I don't remember seeing this setting before today so maybe it's new.
Jan 1 2019
Never mind, it fixed itself somehow. This morning I downloaded the latest version, extracted it from the zip folder and had the issue. I didn't even re-download, just re-extracted from the zip folder and it fixed itself. Weird.
Nope, still having the same problem. Even loaded factory settings
Dec 31 2018
It works, but every attempt to – Deselect all (alt-a) / Click on any object in front of another – cycles between the involved objects.
(current 2.8 factory default)
Not sure if this is considered a bug or feature.