Guild Hall Treasury Deposit Bug.
Yeah, noticed the same. Suspect is result of the April 20, 2016 change: “Limited guild treasury transactions to one at a time per player to ensure guild members see an accurate view of the treasury”.
Yes, I have seen that occur, a short (few seconds) delay from when confirm a donation to it appearing in the guild activity log etc, I’d just presumed it database buffering / caching or some such as, didn’t see it as a “bug” needing to be fixed. Certainly this current alternative is less desirable (having to click-drag-confirm for each unique or stack of item wishing to donate, gets tedious).
Guessing the problem is, say if Guild Hall needs 200 of X item, and two members just happen to donate, for example 150 of X each at about the same time, there’s the potential for either (a) the first 150 goes through, then 50 of the next persons is added and the other 100 just vanish (lost), or (b) get situation of having 300 of 200 X which could result in weird things happening.