Cura ironing issues

[gwfami 0]

I'm using Cura 4.11.0 on a Macintosh to slice my designs for printing on a Snapmaker A250.  I've turned on ironing on the top layer only, and where it works, it smooths perfectly.  The problem is it doesn't smooth the entire surface, but leaves portions of the surface actually rougher then if iron wasn't on.

 

Here's a couple of pictures, sorry for the brightness but I needed to be able to show the issue.  You can see at the top and bottom of the print it's really rough.  I've had this issue with a couple of different designs now.

 

I'm including the curaprofile,  the stl file and the gcode file.

 

Any help will be greatly apppreciated.

 

Thanks,

 

GWFAMI

S2A_top w_grid v1_1-Fusion.gcode top w_grid v1_1-Fusion.stl

[gwfami 0]

Oops, forgot to mention, it's 1.75mm black PLA.

[gwfami 0]

Ok, I made a simple gcode file of the very top layer, imported it into Cura and watched the animation of the print.  I'm including a link to the animation and a couple of screenshots showing where it's going wrong on the prints.  It appears to be an issue as the fill is not touching both the inside and outside of the item.  I have the iron pattern set to zig zag, but it's not really zig zagging, but drawing parallel lines. 

 

Is this something that is fixable?

 

(sorry, had trouble converting it to a gif that was usable, so had to upload it to youtube).