@allison_russell
If I'm understanding what you're describing, then you're the second person (that I've seen) with this issue this week. Here is the other thread Math equation editor showing at bottom of screen and they have a screen shot so you can see if it is what you're seeing.
You've already addressed two of the suggestions made there (current browser and cleared cache). Other suggestions are to reload the page (network issues sometimes happen, but clearing the cache normally takes care of that and if you're not seeing slow loads, it's potentially not an issue) are to use a different browser and see if that fixes it. That may be a solution if you're the teacher creating the question (which is how your question reads), but it's not really a good solution if it's happening for students answering a question.
You may also want to make sure that none of your cookies are getting blocked. If they are, there will be a cookie with a red x at the right of Chrome's location bar.
Depending on your level of debugging skill, you can press F12 in Chrome to open the browser's developer tools. Switch to the console tab and reload the page. Look for error messages (normally in red) because if there is an error, it can keep things from loading after that.
You may want to file a help ticket about this so that Canvas support is aware of the issue.
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