Lutz(my 2nd character) got heart key from gallon's shop, he bought a sceptor from shop, grinded it to max, and used heart key to make magical piece. perfect.
and he deposited it to common bank, checked it's there, and I connected again with Flare(My 4th character) and checked common bank. It's gone.
That was huge investment for me(I used all of my pds into it) so please give it back. That piece is likely dark 10% and hit 30% but stat does not matter anyway.
Thank you very much.
Edit : Now sceptor+10 is in the common bank. (It should be Magical Piece), and my 50 pds are all gone.