I am having the same problem running questionnaire 3.8.3 (Build - 2020062400) 2020011508 on a Moodle version 3.9+
I am seeing answers shifting uniformly upward at a certain time - For example, I created a single questionnaire with rate function and responded to it. Some time later the response went from a "7" (the top of the scale) to an "8" (off the scale)
This has been observed in at least four other questionnaires sitewide. Some of them have shifted upward by as many as three rate levels, resulting in responses that are way off the charts.
I am seeing answers shifting uniformly upward at a certain time - For example, I created a single questionnaire with rate function and responded to it. Some time later the response went from a "7" (the top of the scale) to an "8" (off the scale)
This has been observed in at least four other questionnaires sitewide. Some of them have shifted upward by as many as three rate levels, resulting in responses that are way off the charts.
It appears this issue is limited to questionnaires created after a certain time, I'm guessing the upgrade to Moodle 3.9+ and Questionnaire 3.8.3 in August of this year for my instance. I'm not observing rate scale shifts in questionnaires before then.