See link below, I quote: “I wouldn’t call it a “problem” or “unwatchable”. It just will look like you are watching a game streamed online rather than one directly from an antenna, which is still quite good. There isn’t anything to fix, as that is the nature of 1080i data being transcoded to 1080p at 30fps.”
You could also call Tablo Support directly to explain your issue and get it addressed verbally.