Yes, for a while. But I wonder how that happened.
Assuming that the timestamps in the archive.org timeline are UTC:
2020-01-08 17:03:04 UTC capture with content
2020-01-08 18:02:12 UTC capture with "Uh-Oh ..."
2020-01-08 18:10:22 UTC capture with "Uh-Oh ..."
2020-01-08 18:10:25 UTC capture with "Uh-Oh ..."
2020-01-08 18:11:28 UTC capture with "Uh-Oh ..."
2020-01-08 ~22:40 UTC 17:03:04 capture present
2020-01-08 ~23:40 UTC 17:03:04 capture missing
2020-01-09 ~02:40 UTC 17:03:04 capture present
As I understand it, archive.org will take down captures if robots.txt is changed to exclude them. But that can't be the explanation here, because that robots.txt edit would necessarily have occurred after ~22:40 UTC. And that would arguably have taken down
all of the earlier captures.
So arguably this must have been a manual intervention.
And again, no blame. It's just metadata.