Thanks for your reply and suggestions. I took all of them. After the reset, my initial impression is that the captioning might have improved somewhat. However, the issue isn't entirely resolved.
Here's what happens.
When a character is speaking, sometimes the captioning stops in mid-sentence or fails to appear at all. In the former case, I might see the first segment of a line of dialogue in the captions, but then the character continues to speak with no caption appearing, after which the captioning resumes, never having shown the missing text. In some instances, if I rewind the video, the missing text will appear where it should. In other instances, it won't appear at all or will appear only after repeated rewinds.
Most of the text appears most of the time. But the need to rewind periodically to get dropped text obviously interrupts the flow of the story and is somewhat irksome. At this point, though, I'm resolved to accept that imperfection is a permanent feature of the captioning. And it occurs with all of the programs I've watched: e.g., "The Morning Show," "Shantaram," "Slow Horses," and the films "Greyhound," "Finch," etc.
Other streaming apps such as Amazon Prime, HBO Max, Showtime, etc., don't seem to present the same captioning issues.
