I'm on 10.14.2 β3, but I believe its been like this at least on all 10.14 but I have had a mail-conversation with Smile that started Nov 11, 2017 and at that date I was on 10.13.2 β (17C67b) (identical problem with my TextExpander snippets).
I do recall that the behaviour was happening with the β-releases and eventually got fixed with the public-release. However, I'm almost sure it never worked on 10.14.
Best regards
Gunnar