Not a major issue but would be nice to see fixed...
The first code marker on an auto-property/constructor within VS2015 Enterprise is not aligned correctly due to the reference count inserted above the auto-property/constructor by visual studio. As a result the first code marker is floating somewhere between the reference count and the auto-property/constructor signature.
Thanks for sharing this. I'm having a hard time visualising this - is there any chance you should share a screenshot? If this forum won't let you easily place one, you can submit one through the contact form.
Thanks for sending through the screenshot. I can now see what's happening here. VS Codelens is distorting the line marker coordinates. Where a line has a codelens block attached to it, the actual height of the line is about double what it normally would be. This makes the marker appear offset with the physical code.
It's very hard to make promises on whether I can fix an issue like this, as VS integration always has a way of dropping roadblocks in this area, but I'll see if there's anything I can do. Thanks for taking the time to report this.