Others have given you some ideas, but the Dashboard can only show you what Hubitat knows. If the bulb was on and power was cut at the switch, Hubitat will still think it's on (if it was "soft" off before, it should remember that too). The bulb doesn't get a chance to send an "off" message after its radio gets turned off. The Dashboard only reflects what you see on the device's page in the admin UI.
If Hubitat does indeed know the state, "on" and "off" switches do show up at least slightly differently in the Dashboard. How different depends on your colors, as with bulbs the icon itself is the same for either state (though if you only care to view you could probably use the "attribute" template and just see "on" or "off" if you choose the "switch" attribute--very clear, but possibly not very useful). An overhaul of Hubitat Dashboard is coming in the future, so this may change. I have a hard time telling the difference myself, so I would welcome more of a difference.
But back to the issue of how to prevent this: if you don't use any bulb-only features like color or color temperature control, smart switches could work instead of smart bulbs. Obviously, there are many reasons people avoid these (more difficult installation, may not be allowed if you rent, usually requires a larger wall box and neutral wire that may not be present in older houses, and not everyone feels comfortable doing this but anyone can change a bulb). If you do want bulbs, I've explained a lot of alternatives in this post, but most involve some sort of scene, button, or switch device you can use to keep a switch for physical control (though not always the same switch) and hopefully make everyone happy. 
