Radio Buttons turn red with a jagged outline and won't allow submission of completed envelope.

Our organization just released updated envelopes for intakes.  We’re receiving calls from clients stating that they’ll reach the questionnaire page with radio boxes being used in a “on the scale of 1-5” manner, and not being able to complete the whole document without Docusign returning them back to this questionnaire page.  Each question has their own group of 5 radio boxes.  When they reach the end and attempt to submit, it brings them back to this particular questionnaire page where the very first question (line 1) will have all the radio boxes lined with a jagged red outline. 

So far, we’ve gotten 4 different clients who have reported the same exact issue.  The work-around I managed to find was instructing them to make another choice in that group of radio boxes, and then changing back to their original number choice.  So far, that’s been successful in bypassing that nuisance, but I wanted to know if there’s another way at troubleshooting this.  

All I’ve done thus far is delete that group of radio boxes and then reestablishing them.  Has this occurrence happened to anyone else?