[herb] - kinda. Gathering atleast.

Q u o t e:
I can gather herbs while shifted.
Why cant i gather glow caps while shifted?

There is actually a bug with shapeshifting and herb gathering, but only regarding the flight form. Currently it's possible to gather herbs while in flight form, which is not intended. This will be corrected in a coming patch.

Not sure about the glowcap, but Highlander's explanation sounds feasible.