In 0.38.1 the dev-state is not showing up

I click on it, but is not coming, awaiting now 3 minutes+

You should fill out a bug report here: https://github.com/home-assistant/home-assistant/issues/new

You could try to clean your browser cache and reload the frontend.

1 Like

yes that was it

Cleaning browser cache wasn’t enough for me, also had to do a Shift + Refresh.