I can live with the behavior. It’s not going to be seen by a user, so it doesn’t matter. It’s just an annoyance. But how often do you NOT make a change and restart the program 
You’re always making changes, so this is a non issue, other than something odd is happening under the covers with PWA. I think it is related to the issue in Modifying PWA.js code - #7 by GaryGorsline (post 7). And it may be a chromium issue.