When I type and click a synonym when trying to add a favorite tag, I get the message
"tagname does not exist on this site."
I received this message when trying to add
vscode on Stack Overflow and
block-designs on Mathematics.
The behavior I'd expect would be:
- The synonym is added and the master tag is searched or
- The master tag is added
Especially on Mathematics, the tag synonyms are not obvious and it is reasonable that I'd know a synonym but not the master tag. It isn't hard to find it out but I was on mobile at the time.
This post seems to indicate that adding synonyms used to be possible if not fully supported.