Talk about a blast from the past! My apologies for the brief (and not very informative) description. I vaguely remember this ticket and what I was doing to discover it in the first place, maybe Nate Lust remembers it better? I remember that I was looking into making measurements on the deblender that would eventually become scarlet, and that there was some condition that caused this to happen. I wasn't sure if it was something I was doing wrong, since I was still pretty naive about how the stack worked at that point, or if it was a true bug, so I ran it by Nate and he confirmed that it was not expected behavior.
I feel like it had something to do with having an exposure, running `SingleFrameMeasurementTask` on it (maybe a subset of the full mergedDet catalog?), and then trying to make a different set of measurements directly on the original coadds. But the second set of measurments returend garbage, so I finally looked at the coadds and that's when I saw that they were all noise except for the last footprint in the catalog that was deblended. When I get back next week I'll look through my old notebooks and see if I can find the one where I discovered this. Then I can hopefully give more information as to how to reproduce this behavior, if the bug still exists.