oh yeah. this could be a buffering thing from dota logic where if you cast before you get stuned and what ever happens the character will recast the spell ou were interupted. i forgot what case makes it so, very common for fissure to be cast way off when you just got canceled and it doesnt cancel anymore it just goes through. so i wonder if this is the case do you have it buffered to cast the dome and then you reclick.
And i wasn't aware that some spell did not use this setting. and ofc they all should follow the setting you want.