Chrome OS and Chrome Browser always the newest versions (both are Chrome, dunno why Google didn't name one different)

If I happen to have more than 250 items in my Inventory because I've been scoring a lot of battle loot, quickstocking into my shop or attempting to add items to Wardrobe via quickstock causes a 504 error.

The likelihood of this error seems to go up the more duplicates of a particular item I have but doesn't seem to be related to how many different kinds of items I have. if I'm scoring a huge stack of cheapie items to Fragmentize, then quickstocking these will result in a 504 too, so it's not just loot that does this.