It looks like at some point, the action event handlers were moved to the document (checking that the target is correct). It seems like this totally breaks the .stop modifier. That calls stopPropagation, but that doesn't work if its an event on the document. There is nothing to stop propagation to. The intended behavior would seem to be to stop propagation from the element the action is on to parent elements, but that isn't working if the event is actually on the document.
It looks like at some point, the action event handlers were moved to the document (checking that the target is correct). It seems like this totally breaks the .stop modifier. That calls stopPropagation, but that doesn't work if its an event on the document. There is nothing to stop propagation to. The intended behavior would seem to be to stop propagation from the element the action is on to parent elements, but that isn't working if the event is actually on the document.