Irrigation Head Symbols' Background Masks Going to Top of Draw Order (AutoCAD 2019)
Issue
You're using AutoCAD 2019, and your irrigation heads are appearing with their background masks at the top of the draw order, above the text.
Cause
You are experiencing a known issue with the draw order in AutoCAD 2019.
Solution
You can resolve this issue by running the 2019.1 update.
This update will fix the issue noted by Autodesk as "Draw order is maintained correctly when modifying objects in paper space," along with several other issues with AutoCAD 2019.