While working on process copies yesterday that a client made for my testing purposes, I noticed that the autofill button had disappeared. It was clearly present on the original process, and even with identical CSS and JS code the copies had no button. I got it to re-appear simply by changing the related lookup rule, changing it back, then saving. I thought maybe it was an isolated issue, but saw the same thing happen again for the same client today.
Was wondering if anyone else has had the same issue and if it was fixed in a later version. They have version 10.1.0.642.