In 0.12.1 version there are multiple issues with "Update" button on "Timeline" tab if use "Interval Mode = Date range". All issues are presented on video https://user-images.githubusercontent.com/2630978/213903761-d295b2f6-b95b-4896-aa8c-5fe36cefe94c.mp4

1. UI sends a bunch of requests with "start = start_date" and "end=end_date" on one click.
2. UI doesn't update interface if received 0 events.
3. If don't change start_date/end_date and press "Update" button then nothing happens in sense of back-end requests (imagine situation when user wants to update events on the timeline for "today" or after "Export Raw Events" operation).
4. (optional and more like an improvement) UI doesn't react on "Update" button presses at all (imagine slow back-end when new events coming with decent delay or case when events on one day totally matches events for another day).

Due to I haven't recorded events on this machine for almost the whole month then it gets nothing for chosen (on video) dates. Actual state is below:

Machine is Linux Mint on 5.4.0-137-generic core, Firefox 109.0 (64-bit).