For the love of God please revert this “intentional” bug that was implemented in response to people exploiting Tyrant in a small handful of scenarios forever ago.
Tyrant bugging out when casted out of LoS is becoming more game breaking as the expansion progresses. Such a spec-defining spell should not be operating like this (it doesn’t even mention this interaction on the tooltips). It’s getting so bad that even if you try to switch to an in LoS target, or if the Tyrant erroneously targets an out of LoS for the slightest moment, it will not cast anything for its entire duration. This is asinine.
Edit: and yes I call it a bug because the feature of how the Tryant responds when faced with LoS issues is so laughably inconsistent. Sometimes it stands there. Sometimes it runs to a specific location then stands. Sometimes it just chases the target around without casting anything.