The +1 to all stats buff that I got from black rose / black attar potion in act 1 has vanished. I thought it was supposed to be permanent buff (until character death).

The main character I gave it two has survived every battle (throwing other party members under the bus if needed). However the buff is now gone today. Although I sometimes leave game afk overnight...I did not see a time limit on buff.

I dont know exactly when it vanished, and I'm suspecting it might have been near time that I fought in act-2 arena, but I'm not sure.

Can anyone else confirm this buff should be permanent? Since there is probably only 1 black rose in game, I have no way to get it back now that it is gone -- I think it would have been better to make it a permanent stat increase rather than a buff.