Intermittent mkeys test failure

https://gitlab.isc.org/isc-projects/bind9/-/jobs/2231254

I:mkeys:reset the root server with no keys, check for minimal update (23)
I:mkeys:ns2 refreshing managed keys for '_default'
I:mkeys:ns2 refreshing managed keys for '_default'
I:mkeys:failed
I:mkeys:reset the root server with no signatures, check for minimal update (24)

I am guessing this is timing related again.

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