Garrosh Mortal Combo/Titanic Might Interaction bugged

the problem i am encountering is that Garroshs lvl16 talent “Mortal Combo” only works partially with the lvl20 talent “Titanic Might”.
Expected Result: After e+q combo with 2 heroes being able to e them twice in the 3sec window.
Current Result: e goes on full cooldown after one additional e. If you only throw one hero after the combo you get the 10sec cd reduction.
Related post describing how it worked the past 4 years: Garrosh Mortal Combo / Titanic Might Interaction Bug.