In the properties of the 8Direction behavior you change 'set angle' to 'no'. Now that behavior is not controlling the angle no more.
And it is up to you to code the angle. The sprite has actions to do that. 'Set angle' or 'Set angle towards position'. If it has to look in the same direction whole game, set that angle only once, preferable in a 'On start of layout' (system) condition.