Yes, you will see them behaving strangely.
Also, are you dosing enough fertz? I've been trying to grow some HC myself, and have noticed it really pearls up more on the days I dose my macros and micros.
Keep in mind HC takes a while to adjust to different conditions than it is used to, like most plants. If you keep up on the c02 levels and fertz then there is no reason it should not grow with some time and patience.