[TYPO3-calendar] Problems with multiple categories

[Rumen Petrov]

I have a setup with 40 categories - all in one calendar.
So there are 40 pages containing the plugin which is configured to show only events from exactly the selected category.

Now when i create an event with one category i shows up in the list view.
When i add one or two more categories to the event to show it also in these the event disappears from the list view. It's not in any of the selected categories list views.