Guild Wars 2

For the Lost Shores event in the Metrica Province area I am unable to harvest any of the five alchemy ingredient nodes. I get a jar from Gukumatz and it doesn’t matter which node I go to first, the potion simply explodes. It also doesn’t matter if I try to harvest it once or twice or if I try to harvest one and then move to another.
Is this normal or is it bugged for me?

Thanks,
Adam.

You might be doing it wrong. I thought this at first due to the explode and KD on using the patch, however, if you mouse-over skills 1-4 they do change very slightly in colour and also tell you what you’ve collected.
I only found one combination that worked however.