get_s2member_custom_fields case-insensitive

Good morning. I’m here to give you the solution to a problem that made me scratch my head for half an hour, and I hope he does pros to someone.

I did created custom profile fields with Unique IDs made of mixed character case (upper and lower case). I find that get_s2member_custom_fields($ID) doesn’t work well with uppercase letters and does return empty ‘user_value’ array elements (strangely it works on wp-admin/user-edit.php).

Putting it lowercase did solve the problem. Have a nice day.