What is the origin of quantum uncertainty?

No matter how you try to measure or calculate certain quantum properties, there will always be some inherent uncertainty, making it impossible to fully understand such a system. But what is the source of this uncertainty? Is it an intrinsic characteristic of particles, or is there another fundamental cause we haven't yet discovered? Could it be related to the quantum fields inherent in empty space, or does that simply shift the problem into unexplored areas?

One of the most astonishing discoveries about the Universe is that our physical reality doesn't appear to be governed by strictly deterministic laws. Instead, at the quantum level, the laws of physics are inherently probabilistic: you can calculate the probability of different experimental outcomes, but only by measuring the specific quantity can you know what your system is doing at that exact moment. Moreover, the act of measuring or observing certain quantities increases the uncertainty in related properties, known as conjugate variables in physics.