Market is illiquid and irrational
Looking at the shareholders list it looks like one of the larger holders was willing to eat a loss to drop out at volume.
considering we just became active for trading, and the time of year it is, many reasons for someone wanting cash on hand exist.
I am not convinced the price drop is directly connected to the motion, outside of the shareholder waiting to dump until it was finalized so that their shares would count on the vote the way they wanted.