Shared Calendar Refresh issue

I'm having a problem with the calendar tab when in presence of shared calendars.

A shared calendar, when selected, does not show the events in right panel. However, the calendar days with events are appearing like they should...bold!!
When selecting the master calendar, all the events appear in the right panel.

this is annoying because is hard for my users to create new appointments directly in shared calendar, as they can´t see the all agenda.
(They are creating them in master calendar (where they can view all events) and then moving it to shared calendar!)

This is happening since the client update from 2012 to 2014 sp2!!
The Client Operating System is Windows 7 Pro SP1
Thanks in advanced