Dropdown field disappears after 'editing' record, comes back on refresh

I have a dropdown field that is only visible if a related module field is false.  It works fine, but when I click edit on that record(no changes made, just hit save) I return to the record view and the dropdown is no longer there.  Dropdown comes back if I refresh the page.   Nothing changed on the related module and their fields.  This is on a chrome browser if that matters. 

Thanks

dependent dropdown refresh visibility