Exchanging Collectables for Counterfoils

Platform: Playstation 4 (may be all versions)
NPC name: Splendors Vendor
Class/Level: Level 60 Disciples of Hand and Land
Area and coordinates: Idyllshire (5.7, 7.2)

Problem Description: When exchanging collectables with the Splendors Vendor to obtain counterfoils, we are now given the option to select how many counterfoils we wish to obtain. However, the vendor expects the player to turn over a stack of N collectables in exchange for N counterfoils, but collectables cannot be stacked and therefore you can only exchange them one at a time regardless. The player cannot select any of the collectables to be turned in if the number of counterfoils to be obtained is set to any number higher than 1.

same on pc