The recent update to the galaxy watch, has changed the theatre mode.
So instead of being on or off by user. It's now only on by 1, 2, 3 or 4 hours.
So no longer is it 'until further notice'.
Spoken to Samsung who can't shed any light on why they'd remove this function.
And suggested the Goodnight mode - which is different.
Anyone know why this happened.? And if there is a workaround as it were.?