Ask HN: What is the vanishing Spitzer-Webb star?

The gif [1] that compares resolution between the Spitzer and Webb telescopes shows a star that appears in Spitzer's image, but it is not present in Webb's. Any astrophysicists here have an explanation?

To find this star, start with the 4 nearly co-linear bright stars. Below and to the right of the topmost of that group is a spot that exists in the Spitzer image, but it fades out as the Webb image fades in.

[1] https://blogs.nasa.gov/webb/wp-content/uploads/sites/326/2022/05/spitzer_vs_webb_LMC.gif