When you try to buy mana or life potions, they are ok.
But, when you try to buy any other potions (yellow, white, black) or scrolls, they are not filling to an empty column of bell slot. They are continuing filling, if there is eg. 1-2-3 pcs of TP scrolls, but not if there is zero there. It happens of course, when the inventory is full, which is a 100/100 case during endgame, that you are full of charms.
For those who don’t understand why would anyone put other potions or scrolls to bell slots: yes, we use them during endgame, for example at Ubers (Lillith, and Duriel), and, 4 scoll of TP is fully enough to bell slots, then I can have 1 more grand charm instead of the tome of town portal…
It was never worked, but guys on the PTR patch list promised, that it is fixed. So thanks for checking again, since it is still not working.