The experience of the alchemy stone is incorrectly displayed

Bug Name:

The experience of the alchemy stone is incorrectly displayed​

Bug Description:

when I grind alchemy stone, I often see the message on the top of the screen that success to grind other things which in my backpack, then my alchemy stone will be affected. Its experience may not be 150% yet, but it shows 150%, or it has grind to 150%, but it shows that it is no 150% that makes this alchemy stone to be unable to grind or grow.​

How to reproduce/proof:

I found that if there are members of the same guild nearby who are grinding, a prompt will appear that the props in the same position are grinding successfully.​