PlayStation 4 app, there is no subtitles option to turn on for Chicago Fire Season 8 Ep 10
Episode 9 there is an option and works fine.
Edit: Chicago Med Season 5 Episode 10 also same issue.
Still not there, so thought give laptop a go - the app never works as it just closes.
There is an update to the app for laptop, thinking oh it may work this time, nope, still closes, so no idea what this app update was for!