This is exactly what you say.
Chek why WPLMS editor doesn't accept Numbers 31-99 use a combination of the following: "multiple of 10" + "y" + "1-9." but accept Numbers 31 - 99 use a combination of the following: [multiple of 10] + [y] + [1 - 9].
I think I find the problem of saving problem. The biggest problem of this topic that we are discussing for more than a month. The problem is with the " "
In addition to the quiz problem, the same thing happened in the quiz description. It was not saved because part of the text has this: For each question you can validate the answer by clicking on the "Check Answer" button. The quotes around Check Answer
With that you can debug the issue and update.
Yes, this is an issue we have tested and found with double-quote which causing the issue. We have added a Trello card for fixes. Please track the Trello card for update
https://trello.com/c/RyyFmyz6
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