Why the price fell so much today

Everything is pretty stable today +/- 5% but COSS around -10%.
And what is the current situation with new engine? They only have 9 days left to update it. I really hope they have already built it and now only fixing a few bugs.
I have really big hopes for this project and invested a lot in it but on the other hand i don't have that good feeling about COSS anymore. Especially when you hear/read bad things about current CEO. I really hope it's only FUD.
Oh only now i have realized... They are planning to launch their new UI near the end of February not engine.