You do realize that the health insurance provided Is thru a private insurer and not the Government of Canada, correct ?The government of Canada is collecting upto $1800 per year as health insurance fees from international students. They should plan to refund that if they are planning to dis-allow travel.
https://www.senecacollege.ca/international/support/health-services/health-insurance/rates-and-refund-policy.html
https://www.senecacollege.ca/international/support/health-services/health-insurance.html