I don't know if they mean the fix in https://salsa.debian.org/release-team/britney2/-/commit/23be43224af93247b818c574bcd600e216d433cd didn't work, or that it hadn't been deployed yet.
I've seen two more instances of this, r-bioc-keggrest/arm64
(https://ci.debian.net/packages/r/r-bioc-keggrest/testing/arm64/57700381/
listed as reference, underlying problem is #1104334) and
r-cran-rmarkdown/arm64
(https://ci.debian.net/packages/r/r-cran-rmarkdown/testing/arm64/57691211/
listed as reference, though in that case the underlying problem #1104454
was recent enough that there wasn't a failing reference yet).
- Bug#1104335: britney/debci: sometimes lists a non-regres... Rebecca N. Palmer
- Bug#1104335: britney/debci: sometimes lists a non-r... Paul Gevers
- Bug#1104335: britney/debci: sometimes lists a n... Antonio Terceiro
- Bug#1104335: britney/debci: sometimes lists... Rebecca N. Palmer
- Bug#1104335: britney/debci: sometimes l... Paul Gevers

