Hi. I have the same issue. I resaved all settings and cleared all caches (2 days ago after updating your plugin). Typically i recieved 10-15 messages a day. But for the last 2 days i’ve recieved only three. I tested the feedback by my self and it works. But i don’t recieve feedback from users. It’s weird. And didn’t have it with 2.x version. AJAX setting is off.