I was searching using the activity search on the web interface for some of my activities on the Goat Creek trail that I sometime use a ‘🐐’ character in the description of and I wasn’t finding anything.
I tried on the android client instead and the search worked as expected.
Looking further on the web version I noted that search for a ‘🐑’ instead turned up the one of the several activities I had with a ‘👻’ character in its title.
I suspect the web search has an issue with byte conversion or/and utf-16 surrogate clipping of some kind...