I am running SW2019 SP0.0 and I am trying to see if there is a specific reason my mirrored part is showing original everytime upon opening. It doesn't get rid of it until i do a rebuild and save.
Please share both parent and mirrored part files to debug as it would be difficult to answer anything solely on the picture.
Attached are the files.
When I edit your mirrored file , I do not see the other variables of the body move/copy feature. So something messed up in your file. So kindly delete and redo that feature and see if that resolve your issue.
I do not mirror surface body models and I agree with comments made by Deepak Gupta and Kevin Chandler.
How about trying turning off 3D Interconnect and importing the original STEP file as a solid and go from there?
Retrieving data ...