A blue rectangle pops up when I click on the arrow. Why?

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Hi. I’m new to Figma and taking a UX design class. My project is a low-fidelity movie theatre app. I’m having a problem with one frame. There are only two connections on the frame and one is not working. Each connection goes to a top-level frame. One connection is supposed to go to one frame and the other connection is supposed to go to a different frame. The interaction details for both connections appear and are correct but the function for one, the back arrow, will not perform in the prototype. When I click the back arrow, my other connection, a button, lights up. My research tells me that the button is a hotspot but so is the arrow. All my other connections work. Why would this not work? It’s really annoying that something this basic is not working. What am I not doing?