Sorry, the second time in a row you selected the same drop down, it was ok.  This was both in 'Preview" in the workbench as well as Reader.For anyone else that hits it, I was able to correct it.  Our computers went through automatic updates and I had to re-boot.  This is when it seemed to start happ...

Drop down list disappears first time selected.  I have had a form working for over 4 years.  was working this week.  Today I downloaded the production version.  When I went to test it (with no changes),  all of my drop downs disappear the first time I select them.  the second time, they stay and I c...