Events Debugger help Empty Event with 422 response code

We are using Google Tag Manager. Some events are returning a 422 http response code, because of empty event.
Can someone provide any insight as to why there are empty event? and Some events the http data refer url is : https://gtm-msr.appspot.com/

Hi @tyler.feng

I’m not seeing any known issues around this. It’s probably worth opening a support ticket.

You mentioned it’s only happening for some events – is it possible the issue is with configuration of events of a certain type? Can you share your configuration with us (either here or in the support ticket)?