I am having a weird issue with a slide that has layer buttons on it. The buttons work fine to show the layer, and are changing to visited once the layer is complete. However, once I return to the base layer, if I click on the seekbar, the buttons all disappear. The check mark to show they have been visited stays, but the button is gone. I have looked all over to see what may be causing this, and I can't find anything. Anyone have any ideas? I'll attach file for view.