Show default avatar on commit author instead of question mark

When viewing commits list in Bitbucket UI, the commit author will be taken from the email configured on the raw commit and mapped to a Bitbucket User Account if the email matches.

However, if the email does not match, it will show a question mark as the avatar of the commit author as it's not able to map to another Bitbucket User Account.

It would be nice if we can put the default avatar instead of the question mark. The use case for this is that for a user would want to use the a specific name in work and a specific name for other repositories within the same Bitbucket Account.

Username Alias or Email Alias does not work in this case because a user would not want it to show the account name. Instead it should show the name as configured in the raw commit without showing the question mark.