LT/RT triggers register incorrectly in grabs and trick combos

With my EasySMX X20 controller, the LT and RT triggers work normally in other games and when tested on a gamepad tester, but in Skate they only work sometimes and behave inconsistently during two-grab tricks. When I press both triggers to grab, the game sometimes registers one before the other instead of recognising them simultaneously. This also affects trick execution; for example, when attempting the Superduck trick, the game often performs a Christ Air to Superdude or a No Foot Air to Superdude instead of executing Superdude directly.