Blitzcrank Poro Roundup

During my time of playing Blitzcrank Poro Roundup I had seen a few bugs that may or may not have been related to my browser or could actually be bugs. During the first battle with Annie as Blitzcrank after I had grabbed Annie twice I was able to grab her right after she tosses Tibbers behind me which occurred a second after I had grabbed her from the 2nd time. As well as when I played as thresh against singed. After I had killed singed the game basically froze in a sense that I was able to move up and down still, the music from the battle still played, but I couldn't throw my hook and nothing was happening.