It's also possible that the hacker already knew your account before you logged in recently. If the hacker didn't withdraw the funds then I assume 2fa is activated on your account? Or if it's not yet activated the hacker probably thought that it'll notify your email when making any withdraw so he just bet your funds away.
There's a minimum withdrawal threshold. I see that 47 $0.04 Tron bets were placed at a 0.03% win chance. Maybe someone got on your account and could not withdraw and was just trying to win it big and then remove funds. I can send you a list of IP's that accessed your account if that helps but my guess is unless you were running a script or bot then someone got on your account.