Storyline Keyboard Navigation not working with Buttons

Hello everyone! Can anyone help resolve this accessibility issue?

I am creating a scenario interaction where the user selects 1 of 3 answer choices. The selection and submit interaction work with keyboard and mouse, but when I try to navigate on the keyboard using the "Tab" key, I can only select the first (not second or third) button. I duplicated the second and third from the first button, so I don't know what happened/why it is not selectable with the keyboard?

• The buttons are not stacked on top of each other
• They have the "visible by accessibility tools" enabled
• Triggers include: emphasize, hover for audio, hover for character state changes, and submit interaction but those are the same for the functional first button

Anyone have ideas on how to fix this? I would prefer not to have to recreate the buttons and relink all the triggers/recreate the feedback layers. Storyline file is attached.