What gameplay feature is this bug affecting?
Trading and gifting

What's the issue? Please include any error messages you receive and as much detail as possible.
I believe there is a glitch in regards of selecting/highlighting items/lions in the gift and trade box.
If I happen to select an item/lion a blue tick appears meaning I have selected it so I then press okay to proceed, once I have selected okay it then brings me back to the I'm offering box with none of my item selected.
If I go back into my item/lion box it shows my selection is ticked by a blue tick.
I have selected again and accepted the "okay button" it it remains at "0 selected" in any box I try it in.
Despite the items not appearing I can still send them away as normal but it's very annoying trying to make sure I actually sent them as I can't tell what items/ lions I'm sending unless it's sent.

Any links relating to this bug? For example, if a particular lion is bugging, what is the link to that lion?
No

Any screenshots you can provide us with?
I don't think they would help.

Please provide us with step by step explanation how this bug happened so we can attempt to replicate it. If it's complex, please include screenshots where possible:
Basically when I go on to trading center or when I'm sending a gift to someone in mine.
In the I'm offering box I select the item or lion I click on the item/lion so it becomes a blue tick in the little box then press okay, once I have done this the said ticked item or lion doesn't appear in the boxes so it says "0 selected" despite me selecting them and pressing okay.
Despite it saying "0 selected" I can still send items/lions if I spam it.