+RTS -N -qg breaks profiling

Summary

The timestamps aren't monotonic, and next to about the end of the program runtime (mandated by -M) negative timestamps are being produced. See the attached .hp and the nice pic (the timestamped samples were sorted and the negative-dated ones discarded so that hp2ps can consume it):

Steps to reproduce

+RTS -M100M -N -qg -hc something.

Expected behavior

To produce files that hp2ps can handle.

Environment

GHC version used: 9.0.1

Optional:

Operating System: Gentoo GNU/Linux
System Architecture: amd64

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