In the current version of Canvas (December 2019), students have to click a button that says 'Submit Quiz' to submit a survey. Surveys also turn up in the Quiz area. It's possible to add a text instruction reassuring students that a survey is a survey, not a quiz, but because surveys are built on the Quizzes feature, the UI might cause confusion.
It also seems that the survey feature will not be included in New Quizzes, and may go away entirely in 2020 as a result. This timing might give Instructure an opportunity to redesign the survey function.
Idea: True surveys
Create a true survey function in Canvas, one which is distinctly a survey rather than a quiz, at least from the student's perspective. (For example, students would click 'Submit Survey' rather than 'Submit Quiz', and ideally not find the survey in the Quizzes area.)
Keep the survey function available after the switch from "Quizzes" to "New Quizzes".
I have noticed these two related bits of information on the Canvas Community:
This page says that the "New Quizzes" function will replace the classic Quiz function in 2020: What is New Quizzes?
This idea requests a survey function that will remain open as of 2020 and into the future, and which does not look like a Quiz to a student. Community members may also like to look at related ideas like: