Best graphics but I lagged I lil bit but a great game to play even though my phone has only 32gigabiets but its worth it

Anytime I play classic or ranked matches, my hero keeps moving on it's own and the system tells me it is exhibiting AFK behaviour I.e  under AI control. I really don't know how to take it back to my control I just started playing the game and I am not experienced in playing games, I just started playing them and MLBB is my first. Please explain how I can do it. Thanks for your support.