Doh! Simple error I’m afraid – I had made a typo in the shortcode, i.e. lostpassword instead of lostpass
Sorry for wasting your time.
All good now (apart from stopping spam registrations even with reCaptcha v2)
Thanks for responding Jeff. No I am not seeing any fields – just a blank page apart from my title of the page.
As I said it is strange because the other options are working fine.