Here's a paper on it: https://www.researchgate.net/publication/283669822_Connectio...
The upshot is a charged shell will modify the acceleration/inertia of particles inside the shell, according to Weber's Electrodynamics: https://en.wikipedia.org/wiki/Weber_electrodynamics
Am I missing something ? because you just linked an article that clearly disproves your first assertion.
... and followed it by what looks like a poorly written research article by a self described "independent physicist" (https://nitter.net/tavi_balaci) with only three published articles and all kinds of red flags.
> After all this thought and preparation, the experiment became what has been called the most famous failed experiment in history.
We accept Maxwell's equations as the truth, not Weber. I'm not saying this alternate approach is true, it's just my opinion we missed something, collectively.
The paper is likely poorly written, but it's something I found while researching this a few years ago. Just sharing it for others to see. Again, my comment isn't claiming one way or the other...