Completed fields randomly clear when button pressed using automation (FitNesse or Ruby).

#AppianFitnesse
#GeneralInterest
We have an issue where a field can be populated by FitNesse but when a button (i.e. Submit) is pressed, the field is cleared and the page errors because of the now-empty field. This randomly happens but it is the same field/s it happens to. One is a simple page with text, a field and a button.
Note: I have witnessed this using Ruby as well, so it's most likely an Appian/Sail and not a FitNesse issue.

OriginalPostID-252844