Is there a bug with find or contains in Arrays, Sets or Maps?

Hi, I am facing a problem with unreal 4.21 where I cant find an item in a Collection when the item is in it.

The same tthing happen with sets or list.
I tried with simple Strings as keys too

well for me it worked when i did the test normally like just a array with two things and finding if they exists. however doing the same with inventory causes this same thing to occur. i basically check if the item already exists but it just make the condition false. i feel like something maybe wrong but ill try on it later cause it might just be a problem on my side

I found similars errors reports, however I suspect that this should be happening only under certain circumstances, I mean, if this is a general bug, there is no way that so few people notice it.