Not Bug Untradeable chair but its says random chair for 2 gachapon stamps and 1 stamp for untradeable chair

IGN: scarletmapel

I use the gachapon stamps to claim chairs at ludibrum at the empty house.

I have The Spirit of Rock Chair which is untradeable and previously did the same for robo rabbit chair. It seems all of the chairs are untradeable.

Please advised on this and let me know thanks. :-(

 

Hi... It is 1 stamp for untradeable and 2 stamps for a random chair, which can be either tradeable or untradeable.
You have a chance to get tradeable with 2 stamps but it is not 100% while with one it is 100% untradeable, this is not a bug.

 

Thanks!