Event handler being triggered (almost) anywhere

I'm mystified by the behavior of a page in my app that includes a button containing an event handler which resets a variable to its initial value. The button behaves as expected, but click events at many other spots on the page have the same affect for reasons that are unclear to me. I am familiar with event bubbling, but the event handler is contained only by the button, which itself has no descendants. This behavior seems to occur when the app is in preview mode but not in edit mode.

NVM. I now see that the container had somehow acquired this event handler, which explains the results that I've been seeing.