Your data roaming in the Pacific Northwest with the Bell/Telus network is 95% broken at present.
UDP works. QUIC works (such as to use Chrome on a mobile device to do something with Google). Ordinary port 53 DNS resolution works.
TCP is entirely broken.
After a considerable amount of time, I have given up trying to get this information across to a first-tier customer support representative, and have not been successful in escalating it to somebody who actually knows the difference between TCP and UDP.
Contact me off list if you need additional information.