We use a little blue line to help indicate which view is currently being shown. When you switch between views, switching the tab which is underlined looks really bad. There's always a period when multiple things are underlined. Transitions would feel nicer if we could fix this and should be low effort.
tracking+ for polish One easy way to reproduce this condition is to double-tap a day in month view. It will zoom into day view with both month and day tabs highlighted.
we have plans to change the double tap behavior on the month view to create an event instead of moving to the day view (Bug 1037351)
Created attachment 8549168 [details] [review] Link to Github pull-request: https://github.com/mozilla-b2g/gaia/pull/27392 Seems to fix tab lag
this is in fact a duplicate of Bug 1021445
Landed on master https://github.com/mozilla-b2g/gaia/commit/7da5aa3c52f0d8949afe389869cf507315e6e268