Read about assertive communication. You should push back. Also, make your manager aware how this is affecting your deadlines. Don't think .. well I am getting paid so whatever. That is wrong. Either it eats your hours, your brain energy or something else. Software is too competitive.
I had to deal with a function not in my role, because the person responsible quit. The org was on a hiring freeze so I sucked it up. It was terrible as my goal was not to let the ship sink (that is a terribly low goal to have, frankly, but best under the circumstances). I asked for a pomo (which I believe I will be getting shortly). I also pushed for a new hire to fulfil the function (which has happened now).
So don't just accept shit. My 2 cents.