Image creator here. This is such a massive dataset, most of the image processing needed to be custom written software pipelines. It not really practical for every pixel to be hand inspected. A few defects (and bright asteroids) imprinted through. It really hard to decide what is a real weird thing in the universe, and what is some sort of instrumental effect. We try to not pre-decide on what we think we should be seeing and filter for those by using things such as using classifiers. That leaves us with heuristics based on temporal information, size (is it smaller than a point spread function), and other related things. On large numbers of objects and pixels 1 in a thousand or 1 in a million outliers are bound to occur.

Could be a satellite that moved into the frame during green.

There was a livestream presentation and press conference up on YouTube

https://www.youtube.com/live/Zv22_Amsreo?si=zQLeGfJokZoCPkji

At time 1:38:19 - one hour 38 minutes 19 seconds - into the livestream presentation, there's a slide that shows RGB streaks of fast-moving objects that were removed for the final image.

Those streaks are apparently asteroids.

Perhaps it is indeed a glitch or cosmic ray event.

(Is there a better URL for the slide deck?)

something red https://skyviewer.app/embed?target=186.82033+8.25479&fov=0.0...

might be bad cosmic ray rejection during green exposure