Couple of issues. Siri and Safari on my MacBook

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macOS & Mac Apps

Hello,
Siri does not appear to be working properly. I am on a MacBook air and am up to date with all the up dates. If I press the FN key with space bar, siri takes at least 40 seconds to respond. When it does, it says 'sorry, I did not hear that'. It has worked well since the last up date I think.
The other issue I have, when in Safari on numerous occasions I get the message "Safari busy". I have regularly cleaned up my MacBook with the Disc cleaner app hoping this would help but unfortunately not.
I am on broadband and our connection is good.
Any help would be appreciated.
Many thanks

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