Hi Deborah,
We’re sorry you’re running into this and understand this is frustrating.
The issue was brought about not by one of our updates but by the Roku 14 update. Roku 14 came with many improvements but also changed how Roku streaming devices deal with Surround Sound audio (AC3). Since AC3 Surround Sound is the standard audio format for over-the-air television, this change impacted how our 4th Generation Tablo devices interact with Roku for live TV playback.
You can see further details here: Update on 4th Generation Tablo Compatibility with Roku OS 14 - Announcements - TabloTV Community .
We’re working on a firmware update that will address this new Roku behavior, more about that as well in the link above.