Mysterious line trace in scene

Anyone know what this mysterious line is in my level?

This is with everything hidden in my level, its still visible.

There is nothing where it starts and nothing where it ends.

Some actor must be generating it, even if it’s not seemingly connected to one.

If you go to any BP, type in Trace into the Search Field and click the binoculars button, you’ll find all BPs that use any kind of Trace. Or maybe the Level itself does it. Either way, it can’t exist on its own.

If it was an actor it would go away when I hide all actors in the scene. I have done a search in my project there are only 3 traces by channel and disabling all of them does nothing. There are no other line traces or debug lines being drawn. The level BP is empty.

Well looks like restarting editor fixed. Pretty sure I tried that like 6 times, but its just gone now. Weird.