It should be working. One reason I can think of why it’s not showing up on your status bar is because your attack speed is already high so the 1% is somewhat negligible.
Remove all of your buffs and agi increasing items. Remove also your pet. Once done, check your attack speed. Then open again your egg to see if your attack speed increases.
You can also try this to a character that has a low aspd and see if the aspd increases.
If I can remember correctly, the 1% increase in attack speed should be more visible if your attack speed is low.