We're having rendering issues of CIM Shape Markers / Solid Strokes when using large values for dash template, placement template settings.
Here's an example:

Here's an example of smaller values for dash template, placement template properties where rendering seems fine:

Settings for J (Shape Marker):

Settings for line (Solid Stroke)

Settings for label (Shape marker)

Additionally, we noticed that setting "Perpendicular offset" on the label has no effect in 2D view, however in 3D view "Perpendicular offset" seems to work.
We would like to increase these distances between the markers to remove clutter from the screen as we might have multiple such and other lines.
We're using the latest ArcGIS Maps SDK for Qt 200.8, on Windows 10 with Direct3D.