bugfix

        // While scrub/rebuild is running, blocks may not be on all nodes

        // yet — skip the expensive network fetch and use cached data.

        // But only when there IS cached data to fall back on: if a node

        // has never successfully fetched this domain (fresh restart, empty

        // cache), it must still attempt a real fetch even during scrub —

        // otherwise a scrub/rebalance that never settles to idle (e.g.

        // perpetually re-flagging the same groups as incomplete) would

        // permanently block that node from ever getting its first data,

        // stuck showing "cluster data unavailable — waiting for peers".

        if (cluster->isScrubRunning()) {

            auto cache = getDomainCache();

            if (!cache->buffer.empty() && _Buffer.size() <= sizeof(AuthHeader)) {

            if (!cache->buffer.empty()) {

                if (_Buffer.size() <= sizeof(AuthHeader)) {

                    _Buffer = cache->buffer;

                    _ClusterDataExists.store(_Buffer.size() > sizeof(AuthHeader));

                }

                return;

            }

            // No cached data at all yet — fall through and attempt a

            // real fetch below despite scrub running.

        }

        auto cache = getDomainCache();

        auto now = std::chrono::steady_clock::now();