Events date disappears / is not shown when editing

I use several installations of Events Manager and every of them is suffering same very irritating problem.

When editing an existing event date and time picker seems to disappear starting and ending date. Time still excist. So when I try to save event after editing I have to select date’s again. It feels silly.

Here is an example picture how the date is shown when editing an excisting event:

https://www.dropbox.com/s/uiq8zneodxm3uea/example.jpg?dl=0

Is there a way to fix the problem?

I would appreciate a lot if anyone can help.

Thank you!