NO, it doesnt! His power, no matter how it happend, should still stay that way. This isnt druken fist style, where you lose it afterward (assuming you need a drink to perform it). I mean its not like Aizen leaked some of his power during SS arc to Ichigo or something of that sort, and now he aint doing that no more. There is no defending this manga, not even the art, for real. There are so few pictures that there is no excuse but to make them look decent. Most of the time, you cant tell what move is being carried out. Kubo simply ruined Isshin's appearance with that comic relief with Ichigo. This isn't Ramma 1/2, please!
Killing time while waiting for the next chapter. OnePiece, that is.