I don't know if this will solve your issue, but I wanted to share in case it helps others. I was having the same issue. I had a gallery within a container, and the text inputs tabbed as expected, but the dropdowns and date pickers would be skipped. I had the DisplayMode property of the Gallery set to be in edit mode or view mode based on a variable within the app. I discovered that when I removed the code from the Gallery's DisplayMode property and set it to DisplayMode.edit, the tabbing worked as expected for all fields/input types. My workaround was to use the formula in the display modes of the inputs directly, rather than the Gallery as a whole. I'm not sure why this worked, but if anyone is facing this issue, check the DisplayMode property of the parent Gallery, Form, etc. to see if setting it to DisplayMode.edit resolves your problem.