Problem with Setting Up Automations

Hi

Not sure when this problem started as it’s been a month or 2 since I last created an automation thru the UI. Currently running 104.3. When setting up an automation all is good until I come to the ACTIONS section. Here I can select an action type and service but when it comes to select the entities the drop down ‘stalls’ (the list fails to populate correctly) and I can’t select any entity/device. After a short while the whole browser window becomes unresponsive.

This happen in all browsers and with cleared cache. I deleted and recreated home-assistant_v2.db

I have logs set to debug but can’t see anything there.

Any advice is great.