jQuery ajax adds um_current_locale

I notice that this plugin (which is really awesome) does some “extra” when I don’t ask for it.

Currently, I am building a plugin that does some jQuery ajax calls to an API. All the calls fail, because, after some research, Ultimate Member is adding &um_current_locale= to the payload. I don’t think this is really wanted.

How do I know it’s Ultimate Member? When I turn it off everything works. When I search through all the files of my WordPress instance only Ultimate Member contains the um_current_locale.

How can I fix this? I don’t want to change anything in Ultimate Member or use a different membership plugin.