I'm having some trouble with getting legend symbology for lines accurately represented in the layout legend by comparison to what the layer symbology defines in the map. Specifically, when I have a dashed effect on the line with butt ends and a round join type, the legend item draws it as a dashed line with square ends and round join type. From the best I can tell, round ends get converted to square ends as well. The only fix, that I have found, is to convert the legend to graphics and change the end type for each affected layer. This is a real pain. Has anybody else experienced this?

I've replicated the issue on three different Pro projects. I'm working with ArcGIS Pro v 1.4. I did not experience this issue with v 1.3. Of the three Pro projects I tested, two came from v1.3. One is a new v1.4 project.
Really I just want to know if others experience this before I log a bug.
Thanks!