Yes, I try everything. I am not using cache, but to be sure I click on clear cache. But now I find new information about this bug. I am using Joomla Administrator in Czech language. I switch to english and I want to record you video to show you, what is wrong. But when I switch to english - it works good. When I switch to czech language - it not working.
Maybe something with language file..?
// EDIT - I try copy paste new czech language jevents but nothing change. So I made a video:
https://youtu.be/WSIA8-Okccs