Cannot select text within formula code

[Antony_Bearpark]

For some reason I cannot select the text within my formulas, meaning I cannot choose which text to copy for pasting later. It is only within the formula editing that I cannot edit the text. I can select text everywhere else:

Selected text on here:

Can't select text here

Okay to select text here:

[ScottWorld · Accepted solution]

Did you try a different web browser? You might also have a browser extension interfering with it.

[Antony_Bearpark]

Weirdly started working after disabling an Accessibility extension