Drupal version is 8.9.2 and I am using "Seven" as admin theme.
Strangely, onl...

Drupal version is 8.9.2 and I am using "Seven" as admin theme.
Strangely, only the second entry is not visible in node-edit form, all other entries are visible. And, I didn't see any errors in JS Console and also in dblog.

There is a JS error only when I re-order this empty entry. I checked and I didn't write any custom alter along with this. I am also using fullCalendar module. Please let me know if I should update the module version to 3.0.alpha-0.2. Its currently on 8.2.x-2.8

The field setting in form display is set to "Date and time range". I feel the problem is within the field widget in SmartDateWidgetBase::formMultipleElements