Hey everyone!
Here is a video showing the issue: https://www.shushustorm.com/_Uploads/Serif/macOS/1_10_4/SymbolDoesntSync.mov
I am using Designer 1.10.4, which may not be the most current version. I am rarely updating in order to keep workflow stability.
I searched for "symbol sync" and didn't find this issue.
Best wishes,
Shu