Start by telling us what operating system and device you're using.
We apologize for any inconvenience that may have caused. We are planning to release the new update containing the fix for the defect soon.
In the meantime, would you take a look at Reply #9 in the following thread to see if you can apply the workaround?
Here's the screenshot of the desktop version of Acrobat's Dropdown Properties dialog.
If you deselect the "Commit selected value immediately" check box for all of the dropdown lists in your form, you can avoid the problem.
Thank you for your patience.
We are using ios 8.3 operating system. I will give the work around a try and see what happens.
We just released the new update (version 15.0.2) to the App Store.
This update contains the fix for the problem with drop-down lists regardless of whether the "Commit selected value immediately" checkbox is selected or not.
Please give it a try and let us know if your problem is fixed.