Does anyone have solutions for a better workflow?
In general, within current Classic Quizzes, it is best to only have one person editing a quiz at any one time. What you described earlier would be expected behavior when two or more people are editing the quiz at the same time. The quiz is not like a Google Docs document on the cloud where you can have multiple people editing it at one time.
Is it possible to see when someone else is editing a quiz?
Unfortunately, no. You *might* be able to see user activity in some way, but this wouldn't be via the Classic Quizzes screen.
NOTE: Instructure isn't adding any additional enhancements to Classic Quizzes...as it will eventually be phased out and replaced with New Quizzes. Classic Quiz Sunset Timeline (Subscribe!) - Instructure Community (canvaslms.com)
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