A few days ago, we ran into a problem in our exam.
On the screen of some people, questions and random words that have never been uploaded to the system are seen. These words were not included in other questions. The longing and predicate of the questions were in different places. However, there was no such problem in the admin screen. What could be the cause of the problem. version: 3.9.0 (Build - 2020062300)
Generally, it's not a good idea to be using 3.9.0. There have been 10 bug-fix releases since then on the 3.9 branch (https://docs.moodle.org/dev/Releases#Moodle_3.9_.28LTS.29) - however, I don't recall any bug like this.
I'd like to second this and I spend a huge amount of time following Moodle issues. Without screenshots/more information it would not be possible to trace this down.
In one of the questions, the text of the question is correct, but there is no subject and predicate in the answers, and there are words that do not belong to the main question. These words are not found in other questions or in other questions registered in the system.
In a question, there is a question that does not exist at all, the subject is correct, but the rest contains a different text. Again, that text is not in another question or elsewhere in the system. In addition, the choices should be a, b, c, d, e, but they come out as a, B, C, NS, e. It doesn't look like this on the admin preview screen. It's a problem that only a few users have during the exam. We had done the same exam more than 10 times before. There was no such problem.
One of my students just had the same problem, but with Cloze questions. Words on the question text and drop down answer choices are different on his screen than on mine. He also said in essay questions, the text he typed was auto correcting to random words. Pictures and screen shots below. In questions 5 and 6, the answers "E" and "ES" are replaced by "AND" and "IT". In question 12, the word "Vmax" is relaxed by "INmax". Any help is welcome!