A second invocation of an internal initialization function was added to a top-level setup block (effectively OF(); OF(); instead of a single call). This pattern usually indicates a "the second call ensures X is reset/applied after some intervening side effect" fix. There is no user-facing string change associated with it, but it is included here for completeness because it is one of only a handful of non-version-bump structural diffs in this release.
Evidence
structural diff in the Wh6 initializer adds a duplicate OF() call after the existing OF() call.
Strings lifted out of the shipped bundle, so the claim above can be checked against them.