either the motors are drawing too much ...
or and it sounds more like this,
the esc is damaged.
try swapping it out for an other one if you can.
traxass has good support for repairs if you send it in.

if it does the same after swapping out ... keep changing parts
could be the radio to! but start with esc
any loose or week connection could be failing when you try to open the throotle hard.
but most likely inside the esc that it is happening
let us know what you find.

sometimes it is the last thing that you think of that does not make sense it could be that ... but it is!