I've started to notice this while I'm doing my quests, but sometimes, when I purchase from a main shop (such as Book Nook for Alexander's quests), it will sometimes have it where the purchased part is blank while I my sidebar and the stuff along the top. Refreshing fixes this, but I sometimes have to check my inventory to make sure I got the item for the quest giver.

There is also sometimes where a quest "eats" the item, forcing me to re-get the item to complete it a second time as well.

This has been an on and off again issue for me, today it is an exceedingly common issue and it is also very bloody annoying. I'm now getting 504s when trying to purchase from shops, and if I do succeed in purchasing from a shop, I get a 504 from the quester, which then eats the item.

In fact, I have just tried buying and giving the same item to Alexander TWICE, and have been 504ed purchasing and giving, and lost the damn thing twice.

And a third time, this time buying from a user's shop. This is great.

Four.

Yep also having the old issue of lag and questing. Not purchasing items, double purchasing, quests eating the stuff but not getting credit. Quests insisting I haven't completed it, go rebuy the stuff and then it tells me I'm not on a quest after all. Annoying and frustrating.