Windows – How to disable Windows 10 login prompt to set up a PIN

So I recently wiped my hard drive and did a clean install of Windows 10 using the Windows 10 media creation tool (which includes the May 2018 update). Since then, every time I log on using my MS account, I also get a blue screen telling me to "Use Windows Hello instead of your password". No option to cancel, just a 'Next' button:

This takes you to a screen where you can cancel and then back to a "Did you mean to cancel PIN?" screen with a 'I'll set up a PIN later' link:

Every. Time. I. Log. In.

Anyone know how to disable this very annoying behaviour?

I've tried:

• Disabling 'Allow users to log on using biometrics' and 'Allow the use of biometrics' in Group Policy
• Changing the Registry key 'HKLM\SOFTWARE\Microsoft\PolicyManager\default\Settings\AllowSignInOptions\value' to '0'
• Setting up a PIN and then removing it

N.B. Using Windows 10 Prof (at home so not on a domain)

Workaround

I set up the PIN to be the same as my password (after ticking the 'Use letters and symbols' box):