Controller Button mashing not working

[Lyger]

So for the most part my Xbone controller works flawlessly, Except the few instances where i need to mash the B button example of which is when playing as kahl on his missions and i need to break someone out of a veil i get no response so the timer runs out and i'm forced to have my keyboard close to use that instead, any tips on how to resolve?

[Basan™]

Hulk smash... less?

Nah, now for real coming form someone who had to open their Megadrive console controllers every 1/2 year to clean dust and other sorts of related sweat litter inside those that was preventing a good button(s) contact with the hardware's activator circuitry.
Your issue means that probably you either got a controller filled with litter inside that is preventing good contact between the buttons and their circuitry activators... or a far worse possibility that your controller is becoming near spent and/or has broken circuitry meaning that it either needs a part replacement/repairs or to simply buy a fresh new one.

[Lyger]

i don't think my controller is broken, i still use it for other things in game like melee and cancelling in menus, just this particular instance it doesn't work