Error automatically changes answer | WordPress.org

Hello support team
I use your tool to do multiple choice tests for my employees
My staff responded that the study answers were switched when they reviewed the results page
They said they chose answer c but the results came back saying they chose D
illustrating images: https://prnt.sc/bL_RjK5QaROU
The error here could be that they carelessly chose D, but more and more employees are complaining about this.
I choose random questions and answers https://prnt.sc/akmjtecLPfRC, Is this likely to cause the above error?
So the question is whether the above error can occur or not? Otherwise, how can I confirm that with my staff? Thank you all