We encounter an issue with the HTML5 Scribble signature. The Scribble signature box keeps moving while trying to sign using a Safari browser on a iPad.
Steps to simulate:
yes. it appears this was fixed in CFP 11 for 6.2. please see the 6.2 CFP release notes at 
Usability issues with scribble component on iOS 10 & 11 devices. NPR- 21092