Asteroid Behaving Unexpectedly After NASA's Deliberate DART Crash

One year ago NASA crashed its DART spacecraft into the asteroid "Dimorphos" (which orbits around a much larger asteroid named "Didymos"). The BBC calls the mission "part of an experiment to change the space rock's direction and test Earth's defences against asteroids in the future.
"However, a teacher and his class studying the rock have now discovered that since the collision, it has moved in a strange and unexpected way."
[U]sing their school telescope, a team of children and their teacher Jon