Touch buttons sometimes won't work

Developing my first game for android, a total noob, been working on it for a couple of weeks, game is done but I just noticed there was an issue with the touch input, so whenever I press and hold down the move right or left buttons then jump, the player sometimes stops moving, so let's say I'm running then trying to jump on a platform and then on another platform a bit higher, the first jump works but the second won't so instead I end up running off the platform without the jump button being detected, sometimes I could jump but the move button won't detect so instead I jump in place, this happens when I try to click 2 buttons at the same time, the only way to avoid it is to click and wait a split second before clicking the second button. So I jump then move to the direction I want to jump towards with a delay between pressing both buttons. So how can I solve this issue ?

btw, I have all my buttons set with Event triggers Pointer Up and pointer down.

I hope my explanation made sense.