On February 8, 2022, SpaceX announced the loss of around 40 of the 49 Starlink satellites launched on the Starlink Group 4-7 mission from LC-39A on February 3. For spacecraft initially orbiting at low altitudes, as the Starlinks did at the time upon deployment, many factors can lead to a craft not reaching its final intended orbit.
However, the loss of the Group 4-7 satellites ultimately traces back to the Sun.