Keith (and community),
I also teach Spanish phonetics and have the same problem with combining characters. I have tried all the possible input methods, and the default font in Canvas always misplaces some of the combining characters. I have one solution and one ongoing frustration:
1. Solution: if you are in a Canvas area that allows text formatting (e.g., a Page), you can change the font to anything but the default, and the combining characters will work. Times New Roman, Helvetica, etc., all display correctly in my instance of Canvas.
2. Frustration: you can't format text in Speed Grader, for example. So my feedback to students will appear with incorrect or confusing symbols. I contacted my local Canvas IT people, who said they couldn't fix it (I'm not sure that's true). I also posted a query to the Instructure website; I got a form letter saying to contact my local campus IT--so the corporate run-around. I hope someone at Instructure actually reads my message someday!
At any rate, I hope that (1) above helps everyone get at least some of their IPA to display correctly.
--Robert
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