Missing stacked Items

So I was at the Trading Hub with 6 GoT Bodices , then a player came up to buy one of them which is 50 to 60k each, when I put ONE single GoT Bodice I noticed, that the number of bodices decreased to 4 when It should have been 5, So I Put all 6 of my Got Bodices together, then they decreased to 3 ,So I was suspecting that It was a glitch, As of right now Im not planning to do any trading until its fixed and I already contacted Royale High Support.

Does this usually happen with stacked Items???

Before any of you all ask , maybe the stuff is exploited?, NO, its not I can promise you all that,

So I just wanted to post this if anyone has had a similar experience like me,