Hi Mark,

The Account Changes DisplayName notification is not using single quotes to indicate before & after values in the notification text, which can result in a bit of ambiguity if one sets their DisplayName to blank:
... changed their display name from TestAcct to in group XYZ@groups.io.

The lack of the single quotes can make this ambiguous to the other admins if they get the notification, i.e. changed it to what?  Or Is this a bug and it's not showing what it was changed to?

The corresponding activity log entry does use single quotes:
... changed their display name from 'TestAcct' to '', via web

Therefore my suggestion is to single-quote the notification's before & after values which will make things clearer if someone clears those fields and it also matches the log entry, i.e.
...@... changed their display name from 'TestAcct' to '' in group XYZ@groups.io.

Similarly, I'd suggest to also add quotes to the activity log entry for the UserName change as it's also currently not using quotes:
... changed user name from TestAcctMain to , via web

I can't remember if UserName changes generate notifications but I never got one in testing.

Cheers,
Christos