After a branch scanner failure, revisions are missing from "Recent revisions" UI

Some time ago, <https://bugs.launchpad.net/launchpad/+bug/786804> affected <lp:divmod.org>. #786804 appears resolved now, so I merged another branch into <lp:divmod.org>. The new revision, r2676, appears in the "Recent revisions" area of <https://code.launchpad.net/~divmod-dev/divmod.org/trunk>. However, the previous revision, r2675, which is the one which was involved with the branch scanner error, is not there. The revision displayed prior to r2676 is r2674.