the uncertainty principle has been confused with a somewhat similar effect in physics, called the observer effect, which notes that measurements of certain systems cannot be made without affecting the systems
the uncertainty principle actually states a fundamental property of quantum systems, and is not a statement about the observational success of current technology
while i agree with jz,that's not the issue at hand
the probability of the scenario of 2 electrons being used to determine the momentum and position of a particle being a successful event is practically 0
but even if we go theoretically,momentum exchanged between such collision do not account for all the energy changes overtime in the particle and the electron
as neovim said the space in which the event happens will also interact with the particles and in unequal ways which we're not able to calculate,so inputs for the momentum and position of the 2nd collision cannot be determined
the uncertainty will actually increase overtime since you have to account for even smaller particles taking effect in the process even if the initial state of space is perfect

Just for clarity, what are you referring to in my post that isn't the issue at hand?

Agreed that Heisenberg uncertainty is indeed separate from the observer effect.