Not sure if it's a custom line style, though I would assume it is. Actually, this IS in a 3D file, but as I alluded to earlier; there are many other tree lines in this drawing, and they ALL have the same line style, scale, level, etc. ALL of the others display correctly (the bottom one in the pic) except just this one.
Yes, it is one continuous line. I've also reversed the direction of the line to no avail.
If you look closely, you can see that the bottom line (the correct one) has larger arcs than the top line. They also reverse direction ( facing inward for a length, then outward, then inward, etc.), although that doesn't really show in the image.
You can clearly see that the arcs that comprise the line in the top one are smaller, and are also at a different angle. Basically, the line on the top is different than the line on the bottom.
Obviously I could be missing something, but all of the properties/attributes are exactly the same as all of the other tree lines in the drawing, yet only this one displays this way. Ergo, obviously something is different with this one line.
I'll see if I can get a sample DGN, though wouldn't pathing to a DGNLIB and RSC be a problem as far as display?
I guess it wasn't a big deal, and we've moved on, but I want to solve it, lol.