I created a form with several fillable text fields in Acrobat DC. When my coworker accessed the document for the first time to reveiw it using an older version of Acrobat, several of the fields provided auto-complete options in a drop-down box. The options do not appear when I ccess the document, but the auto-complete options are not words or characters that my co-worker has entered.
The auto-complete feature is not enabled on the form, and nothing I can find in the field formatting explains it. I also tried clearing the form and all hidden data, but the auto-complete options are still visible.