These spells do nothing when cast by Vicious Wolpertinger and from cast-on-hit properties.
Especially Haste, as that’s all it does.
Rabid Dementia still confers the Berserk buff.
The appearance is that Wolpertinger will gain another turn, but this does not occur.
At the end of it’s turn, both turns are consumed, and it’s sent to the bottom of the action queue.