You can easily replicate the error generated in Chrome or Firefox by having two accounts, one of which is sending completed collection items, the other receiving. Repeat this multiple times (usually more than 3-5 for me), and you will see the error message. I would deliberately do it and post a screenshot but then i'd lose out on the item im trying to send to an ally.

Ref the 2nd part when I say "count" I mean the number of collection items increasing by 1 in the inventory (not the number of completed collections you have ready for trading in).

As I stated above Im aware that the item does not vanish from your inventory when sending to an allies request for items - this can be resolved by the cache clear/F5 refresh - the frustrating thing is when you send a collected item and that does not reach its destination.

Hopefully this clarifies what I was trying to explain (well I hope so LOL).

Andy