Add new occurrence does not work after single event added

[wolfy007]

Hi! I have made a new event (simple 1 hour long) and I wanted to add a new occurrence. Actually it puts into the include array, but the calendar does not show that occurrence. Either locally or on the dayspan vuetify example webpage. Do you have any idea what do I have to do differently? If I move the event, then the popup asks for is it a new occurrence and yes is pressed, the same is happening, it puts into the include, but actually the calendar shows it. I don't understand why is the last process working and why the first not? Now I tried something: I deleted the first event occurrence on the same day, when there is an another occurrence and after I deleted that event, the other one just showed up. The first was at 10:00, the second at 15:00.