I've tried just about everything. Issues on Apple TV app, 2 different Apple computers using Safari and Chrome to access NHL.com, and on my Asus laptop, using Chrome, Firefox, Edge, and now Seamonkey as well with NHL.com. I've been on many different internet connections, both wired and wifi. Even issues on 300Mbps connection wited. Doesn't seem to make a difference what software or OS, or what internet connection. Had troubles in Manitoba, British Columbia, and now in Montreal. I'm now watching my games from streams put up by others. These work fine.
Thank you for providing the details, please reach out to us via PM @CommunityHelps so we can take a closer look into this for you. If you're not familiar with our private message system please take a look at this page.