Amend the pre-diagnosis further, so that no email is issued at all
We have a lot of tickets where diagnosis is an irrelevance (ie. for the supply of goods/services). Being able to now tick as pre-diagnosed is great - thank you - but we get an email saying a hidden comment was added to say it was pre-diagnosed. The change you've made is welcome, but we don't want the email. Or should there be a "diagnosis not required?", which isn't quite the same thing after all.
It was a bandaid fix.