Scheduler - Rendering issue with row header height after hiding/showing events

And how do you hide and show the event?

By setting the event's hidden property:

this.scheduler.events.filter(event => (event as any).tags.type == 'Error').
      forEach(event => event.hidden = !this.showErrors);

Thanks - but after changing the event properties, you need to update the Scheduler to make the changes visible.

Do you call update()? Or events.update()?

No, I didn't. That's why. After calling update() it works correct.
Thank you.

Thanks for the update!