Problem is that it turns on again as I restart the app. I think it happens after installing an update. Since I am using only the low volume Plan I experience this nearly always.
I know that some settings are “sticky” and remembered between app updates. Perhaps this setting isn’t one of them? If so, letting them know would be a good thing.
Also, I know this is not a “solution” in reality, but a hack you may be able to use is the keyboard shortcut.
If you have a keyboard in reach, the ‘W’ key will toggle workout instructions On/Off. I am not sure if this is “sticky” either, but it’s a lot faster than having to dig into the Settings each time.