Pinpoint - filtering issue

Hi, I noticed pinpoint filtering is not working anymore when trying to filter by Event Attributes and Metrics and Event Attributes and Values.

Analysing further in network console, this request is fired:

https://us-east-1.console.aws.amazon.com/pinpoint/api/apps/XXXXXXX/events/types/_userauth.sign_up%2Cendpoint/attributes/legacy

which it doesn't return any attributes, but calling the same endpoint

https://us-east-1.console.aws.amazon.com/pinpoint/api/apps/XXXXXXX/events/types/_userauth.sign_up/attributes/legacy

returns the expected results (removing endpoint from path parameter)

Also, even without filtering, the query doesn't produce any results (again it seems ,endpoint is passed in the request while it shouldn't be there.

Regards, Stefano