Vaadin Calendar: HTML in event caption

I would like to have HTML support in the caption of an vaadin calendar event. HTML is processe in the month view but not in the week View.
Does anyone know how I can get HTML support in the week view?
And is there a possibility to have a different caption in month and week view?

Thanks in advance

The caption should be handled the same way in all the views but apparently HTML is not supported in week and day views.

I made a
bug report
of the issue.