This is vague, but there seem to be a lot of issues tonight.
My Direbrew’s Remote couldn’t be clicked on four characters tonight, I cannot use the mouse wheel to scroll through the pages of Vendors, and the Shred-Master Mk1 in Dazar’alor isn’t working.
I have no lag and the issues are the same with or without addons.
Strange. It all seems weirdly buggy tonight.
Have you tried a full UI reset?
No, I am not sure how to?
I really need yo save that link.
Thanks. 
Yes, I did that yesterday.
It’s been working fine, but tonight has some strange bugs.
I take it you’ve since reinstalled some addons since you mentioned them in the first post there. My best guess is that one of those addons is somehow messing with your UI.
I’d give the UI reset another go, do not reinstall the addons and see if it’s still happening.
If the issues persist on the Default UI, please submit a bug report with some specifics to our QA team can take a look.
Thanks, I’ll do this today. I’m in Australia so had to go to bed after my precious post. 
(Edit later on PC not iPhone! Previous post! Not Precious post! 
)