We’ve come across a few customers reporting this issue when using our Feed to Post add-on. Despite the user on the website being set to show the name in uppercase, it’s displayed in lowercase. For example, “Matt Lawson” is always displayed as “matt lawson”.
If this is happening to you, there may be two reasons for it.
1. The most likely case is that you are using WordPress multi-site. Only on multi-site installations, WordPress imposes lowercase characters in usernames. The wpmu_validate_user_signup function for WordPress multi-site forces lowercase a-z and numbers 0-9 only. Uppercase characters are allowed in usernames on single site setups. More details about this can be found here: https://developer.wordpress.org/reference/functions/wpmu_validate_user_signup/
2. Another possibility is that you’ve not selected the uppercase version of the user’s name on your website. To check this, go to the Users page of your WordPress dashboard, search for the user in question, and scroll down to the “Display name publicly as” option. From here you will be able to use the dropdown to change the way the user’s (author’s) name is displayed on your site.
