WARNING: Spoilers for the Fangs of Asterkarn Secret Quest ahead.
I went talking to Rik’Rik with only about 163 Wood Chips in my inventory.
He accepted trading 50 of them for a Wooden Log, and then I kept clicking on the same dialog box to trade 50 more.
I did it 5 times, and got 5 Wooden Logs. I suppose the game should have said something like “I don’t have enough chips” or something after the 3rd exchange, but that never happened.
Yes, I double checked my Storage and Shared Storage and I had no extra Wood Chips there. All I had was 163 on my inventory only.