Headphones on Crave

With our new Telus Home Services I can’t use my headphones with Crave (which comes for free with this service). All other apps on the TV work fine with my headphones. I have talked to Telus technical services and they throw up their hands. They say it’s a problem with Crave even though I don’t have access to Crave, only they do in this situation.  I am hard of hearing and need my headphones. This is ridiculous.