On all of my user fields, the search 2 has stopped working (front end and back end). The values show as a drop down, but if I try to search for the value then it shows "no result".
Example: I am creating a user from the front end with custom fields. One of those custom fields is a relationship field. I can click the value (but not search for it). This is problematic as there are a lot of values.
It could be a conflicting issue with another plugin or the theme. Please try deactivate all plugins, leave Meta Box, MB AIO activated and switch to a standard theme of WordPress and check this issue again.