Changes on groups.yaml do not show

Hi,
new installation here coming from 0.84 Home Assistant version on Raspbian.
Current setup is Raspbian, Docker and Home Assistant 0.103.5 on docker. Not Hass.io
I kind of copied my old config from my 0.84 setup and I am trying to start from here.
The problem I am facing is that even if I empty my groups.yaml file even then the start up tabs are loading. Of course when I add a switch or view nothing changes…
What to do?