iOS Search Function Deprecated?

Am I correct that the iOS app search function is deprecated such that it will not search the content of messages? For instance, I put the word “xylophone” in a project message thread. On the web interface, I can search “xylophone” and have that thread come up, no problem. On iOS, I get “We couldn’t find anything that matched your search.”

Seems crazy that the queries would run differently… Can anyone confirm this is the case?

FYI There was another post yesterday about the mobile search not looking into descriptions even though the web app does.