Charts stuck on 'loading wheel' screen between changing timeframes

As the title says - Have submitted an issue report, but not sure how I would get a response to that on there. 

Timeframes taking between 5 seconds, to 30 seconds to change, or not ever changing at all and just staying stuck with a blank screen and the loading wheel. 

This is obviously making it absolutely impossible to work.

Please, what can be done about this and how quickly?

I've never had this issue before, but have been experiencing it these last few days. And today, it's unusable.

Thanks