The walk records its send to the rest only after every machine was sent,
which takes 20-28 s, so the machine sent first fell outside the 2 s slack,
its report was missed and the phase ended at the next walk's send to it.
Keep each machine's own send time with what it was sent, match its apply
duration by that send and digest, and show each machine's report in the
walk's phases (ADR 0282 decision 6).
jschoubben