My mother had the same issue, I went over one evening to see what she could be seeing, long story short one of the starlink satellites seems to blink off, on the east coast it was on the western sky at about 30 degrees above the horizon in autumn.
Im assuming that blinking is just rotation.
It's likely what you saw was a satellite being rotated such that it stopped reflecting light toward you.
We have something like 1000× more satellites in orbit today than 20 years ago and musk's starlink is putting up like a dozen a month in a straight line around the planet, the night sky is being contaminated like never before.
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