>>16774101
You shoot an electron at the screen and you get a detection event at the screen where the electron hits the screen. So far nothing weird has happened.
You do that many times and see that you get this stripe pattern. If you assume that electrons are point particles this is strange because you'd assume to get two bands on the screen behind the slits.
In fact the pattern looks like the interference of a wave that passes through both slits (however you can't ever measure this for a single electron because a single electron only makes one dot on the screen).
In an attempt to explain this you assume that every electron must be a wave by itself that passes through both slits and interferes with itself. Now you run into a problem because right before the screen the electron wave should be smeared out over the entire screen (together with its mass, energy, charge, etc.) but when it hits the screen you get a single detection of the entire electron with the right charge, mass, etc. So how did the smeared out electron suddenly localize into a single point, faster than the speed of light even? I say faster than the speed of light because you instantly know that there can't be anything to be absorbed anymore in the entire area of the screen.
That's the real mystery here.
Of course you made an assumption that every electron is a wave by itself, which may very well be wrong and the source of the confusion.
For example, there has been this paper that recovers the wave function, hilbert spaces and all the fancy stuff from non Markovian dynamics of boring point particles.
https://arxiv.org/abs/2402.16935
