Same calendar entry but one is ignored

When I create two profiles, each with one calendar entry, and fill them identically, in my example, I only fill the description *🔇*, and in the second profile, the calendar entry differs only by the fact that an additional five-minute start early field was filled.

Only the five-minute early entry is triggered 5 minute before, but not the normal calendar entry is not triggered when the date starts. Occasionally, it happens that the normal calendar entry is triggered only five minutes after the appointment starts.

When I update the calendar entry and change for example the end time while the date is running then it finally triggers my calendar entry profile with no start early value. 

What I try to achieve:

A mute phone when calendar date starts and a mute option 5 minute prior to the time window for example when I arrive 5 minutes earlier.