Hi @richardtinkler
I can’t be sure what the issue is, but I wanted to let you know that I have a clean install of WordPress Version 4.8.1 with ACF Pro Version 5.6.1 and everything worked OK for me.
Check out the screenshots below:
https://imgur.com/ChTX9C9
https://imgur.com/sTBLlKP
It might be another plugin affecting the output perhaps?
Have you tried the default WP theme, or perhaps deactivating plugins?
Let me know if I can help further, I am subscribed to this thread so I will get email alerts with your replies.
