Issue: When clearing multiple grouped notifications in a row, e.g. Text messages, the screen goes completely blank. The E3 appears to have crashed, but it's just a black/blank screen.
Steps: Watch face swipe down > tap group of notifications > press RUN button (top right) to view > press RUN button to clear >> (repeat X times until blank screen event)
Workaround: While on the blank screen use back button to return to other notifications in the list