Documented as matching regardless of language, on the assumption
Gmail's subject: operator does a substring match — empirically false
against a real, currently-arriving LiveTrack email whose subject does
contain the word ("Sledujte LiveTrack používateľa ...", confirmed
2026-09-20): with the filter, the search returned zero threads;
removing it and rerunning found the email immediately. Left out
entirely rather than replaced — from:noreply@garmin.com plus the
session-link regex already narrows this down to real LiveTrack emails
with something usable in them.