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Description of problem:
https://tools.dqe.lab.eng.bos.redhat.com/vbenes/nm_ci_stats/stats.html#build:;search:ipv4_spurious_leftover_route

Version-Release number of selected component (if applicable):
various

I couldn't reproduce the problem, but from log analysis I think this MR could solve it:

https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/1250

Executed 100 times in a loop, no fail.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (NetworkManager bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:8265