Safari 14.01 Popup Window issues

Since upgrading to Safari 14.01, I have been experiencing strange issues.

Example I have been on a website whereby I need to attach an attachment.

So I click on the attachment button. The dialogue box window opens to allow me to add the attachment.

However I am unable to click on anything in that box.

If I try to open the same page in Firefox it works perfectly.

I am having the same issues with Bitwarden too, when I get to a website that needs a password I click on the Bitwarden icon in Safari and the Bitwarden box pops up...but then again I can't select anything. I have to cancel out via the Touch Bar ..again it works fine in Firefox and it was working fine before the updated to Big Sur 11.01 & Safari 14.01

Cheers