Can't see text when typing in a password in 'guest area'

Hi Everyone,

Just after a bit of help! I’ve got a website with a guest area. I’m having an issue where when I start typing the password into the password field, no characters appear (not even a "" for each letter). A few of my clients have got confused by this and reported that the password box doesn’t work. When I click away from the password field, the white box disappears to reveal the characters that have been typed underneath as ""s. Has anyone else had an issue like this?

I’ve tried changing various text colour options but not had any success as yet.

Any help greatly appreciated!

Jon