Vanilla Forum oddities on this site.
here are a few oddities on this forum that could be looked at:
Notify me when people comment on my bookmarked discussions.
Notify me of private messages.
Notify me when I earn a badge.
the email option for these checkboxes always re-enable when you click preferences, even if you click and uncheck and save. open preferences and they are checked again.
also there seemse to be a bug when a user clicks on their own profile - it shows the sign-in message as if you are not signed in and you can't edit your profile until you click one of the numbers in the reactions. After you click one of the reaction numbers the sign-in message goes away and option for edit profile appears.
the buttonbar plugin does not give the options for code comments when re-editing a message
I may not provide the completed solution you might desire, but I do try to provide honest suggestions to help you solve your issue.