Cant access triggering id or index in collection

Triggering id and i variable are not accessible for button action event in a collection. It just returns undefined.
See GIF:
Capture Wheels2Go Mobile  Editor Retool

On a side note, has anyone experienced a really slow mobile editor once adding more than a few screens? The app I made works fine but edits take forever...

When triggering it through a control query event i can get triggering id but not index (which I need to be able to access the information of the card which the button was pressed). See screenshots:

Thanks for surfacing this as well @w2go!

Including this in the report associated with this thread and will let you know when there's a fix!