Consensus health reports wrong latest valid-after time

Over the past days a few people have reported that consensus health reports the wrong latest valid-after time.

As an example, it currently says:

Consensus was published 2018-03-01 17:00:00. Note that it takes up to 15 minutes to learn about new consensus and votes and process them.

but there is a valid 19:00 consensus:

$ curl -kis http://199.58.81.140/tor/status-vote/current/consensus-microdesc | grep valid-after
valid-after 2018-03-01 19:00:00
$ date --utc
Thu  1 Mar 19:33:43 UTC 2018