The problem is also reproducible with 6.7.9 from your repository and 6.4.0 from the 15.6 repository. But strangely, when I downgrade kernel-default back to 5.14.21, or even boot into a read-only snapshot with that kernel, the problem is still reproducible! I'm not sure what to make of this. In any event, it would be nice if I could use any kernel version that keeps the laptop suspended when I close the lid.