Debug in JetBrain IDEA - breakpoint ignore

Hi,
I’m using IDEA 2018.1 Community edition and when I try debug Vaadin Starter Flow app + Spring, nothing happend - breakpoint is ignored. It works normal with V8 app. It was also working some 10 days ago with my test Flow app (still using RC1). But now it’s not working any more. Any idea what change?
Regards,
Matic
17130915.png

Hi,
By disable “spring-boot-devtools” POM dependency, debug & breakpoints are now working again. Auto server restart is now disable.