I can not see all the items in a pack

Hello ! 

I think I have a visual bug or something of a sort. Whenever I click "Browse pack items" on any sort of Apex Pack, when I go with my cursor over the 5th column of items it doesn't show anything that is there, if I slide it over any other columns, it shows the item I have my cursor on. In the picture I added you can see I have my cursor over the Caustic skin and it is being displayed and when I slide it over the Wattson skin or the R-99 skin or anything on that column, it is not being displayed, moreover if I use my mouse scroll, it zooms in the skin that I have displayed instead of pulling the bar up or down. It is not a major problem, but it feels a bit frustrating because this happens with every pack that has the option to browse the items and I can not see if I like or want a certain item from that pack, since I can not see them all.