The final part of the quest is bugged. Indeed, when you double click on Timer's egg, the window opens but then closes as soon as it opens so you can't feed it and therefore, can't complete the quest.
Meeee tooo I run into this bug... 1. The srpingy worm didn't drop from any clocktower monster, I've tried out all types of mobs there but it didnt drop one. I got three springy worm from eggs when I was doing the previous wipe-out operation 1. 2. when I try to double click the egg the mini window open but disappear quickly that I have to hurry to drop the springy worm into that window , then there's a noitce saying "timer has been fed one springy worm", I try feed it 30times but it seems like it didnt work either. lol