GWX: Are T2 torpedo issues fixed after 1940?

[Drakken]

In real life, depth and exploder issues with G7e torpedoes were more or less fixed by late 1940, before the TIII torpedoes were issued and became the mainstay ordnance until the end of the war.

Is it the case in GWX, or do we still encounter depth and exploder issues with TIIs until the TIII arrives? If yes, when are TII torpedoes considered "fixed", game-wise?

Thanks!