hot deploy didn't work

With a fresh project from the v14 starter, the recommended jdk, netbeans 11.2 and spring-boot:run.
Like I understood from https://vaadin.com/docs/v14/flow/workflow/tutorial-spring-boot-live-reload.html I have nothing else to do.

But it all stays like it was after a change in a Java file.

Am I the only one with these problem?

My app reloads reloads fine where there are Java class changes. In my experience stylesheet changes are not picked up. Not sure about polymer templates, we switched away from polymer templates 6 months ago and only use them for components that rarely changes or views that will have a significant performance impact from using polymer templates.

Ok, it seems to be a netbeans 11.x problem. With eclipse or netbeans 8.0 it works.