Calendar to show stuck on ALL?

A few days ago my "next event" widget started displaying all of my calendar events instead of the specific calendar as it has been. I went into KWGT > settings > calendar to show > picked my specific Calendar > OK. But it goes back to ALL. I've cleared cache and restarted the phone with no changes.

Android version 10 on Pixel XL, KWGT version 3.45b7815

Thank you!