We did all the same things before we called them yesterday. I agree, it is definitely an issue with the Bell app on Samsung as our Roku tv is fine. Hopefully we can get a resolution soon.
Having the same issue since last week on our Samsung TV, in Toronto and Time Zone is Winnipeg. Roku is fine. Over half and hour with Bell and they have no idea but 'started a ticket'. Seems that we aren't the only ones.