Editing a swim workout is causing the calendar to become unresponsive. If the page should become unresponsive, close out of the tab/page and then reopen the tab/page. Any changes should be saved.
Workout comments aren't being saved in some cases. Hitting "save" before switching view or before pausing for too long should prevent them from being lost.
"No Data Available" may display in the horizontal graph in the expanded workout view for some workouts. You can correct this by clicking on any of the items in the graph key (RPM, BPM, W) and selecting "show all".