Hue hub 'not connected'

Morning

I’m having a issue and I know i should ask on the hue community but I have an account here so hoping someone knows what’s happening.

I have a hue hub connected to my network and a smartthings one everything usually works fine but today the hue hub says its disconnected so cant use the app or switches to control the lights but for some reason I can use smartthings still! How is this possible, I have done all I can think of except factory reset as I dont really want to reconnect everything

Thanks in advance

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