- Follow the "Common steps" from
- Click in the second instance of the event "no inv rec" (at September 8).
- In the popup window, change the event title.
- Save the event.
- Click in "All events in the series" (although any button, even the canceling one, will cause the bug).
- The events would be updated.
- No error would be reported.
- The events are indeed updated.
- In the Chrome console, one can see the error: