The continual return of old or dead email accounts - this IS a keychain issue

I keep trying to remove old accounts (primarily email accounts) from internet accounts and they reappear all the time. I have deleted any instance of the accounts on my keychain(s) and checked, they still reappear. The only way I have found to remove them from one device is to switch keychain off on the device settings for icloud.

Despite the message stating that the accounts will be removed across devices, when keychain icloud sharing is on, the accounts reappear.

I have read that this is an issue outwith Apple - It certainly isn't, whilst it isn't a major issue, it is pretty annoying all the same. If I find a workable fix I'll share it of course.