Dark horizontal line in Graph View

EDIT: changing back to community CSS theme (Atom) and exiting&reopening the app made it disappear today (2020-06-19), yesterday it had not made any difference
EDIT#2: (2020-06-19 AM11.08 CET) Around 20 mins later I opened Graph View again and the dark line is there again. There were no changes made in settings meanwhile, made new connections tho.

Steps to reproduce

  • open Graph View

Expected result

  • Browse Graph View

Actual result

For a few days now (could be the since the last update), there is a dark horizontal line through the Graph View. Zooming out makes it less dense and eventually it disappears.

Environment

  • Operating system: macOS Catalina 10.15.5
  • Obsidian version: v0.7.3

Additional information

I tried to change theme, then turned off community themes but it did not disappear.

I copied the console log, not sure if it helps: https://pastebin.com/Axxge2fZ