I'm not sure whether its a bug but I'll juz feedback here

I started playing this server today and came to this quest: Winston's Fossil Dig-up. Through the website of Hiddenstreet's guide, it says to kill Green Mushroom to obtain Animal Fossil and kill Axe Stump to obtain Plant Fossil. But I've been killing for quite some time, not a single Plant Fossil dropped from Axe Stump or even other monsters doesn't as well while my Animal Fossil has already piled up. So I decided to post here to sound out to you guys.