Normally, Ashe’s B.O.B lasts around 10 seconds. Her Mini-Bob, however, lasts around 20 seconds. Originally, I thought this was related to mini-bob having 50% attack speed compared to Bob, but even with 20% reduced attack speed (aka 80% of normal), it still lasts a full 20 seconds.
Video: Ashe’s Mini-Bob lasts twice as long as Bob
For a 50% Ult cost reduction, mini-Bob should not have the stall capability that it does. Further, if this is somehow intended, it should be listed in the power description.
(I’m throwing the dynamite in the video to give a timer reference for Bob’s duration. If you time it with a stopwatch, it’s ~11 seconds from throwing Bob to him leaving, and ~21 seconds for mini-bob. I’m guessing the 1 extra second is from Bob taking a second to land).