https://github.com/bitcoin/bitcoin/blob/d72758c3f6c34cd835f5de3efc230964f3b1ea56/src/torcontrol.cpp#L539

If a user is running Tor proxy outside localhost (perhaps on other host inside LAN or in containerised environment) , the automatic creation of onion services ends up creating an onion service listening to hardcored 127.0.0.1 address on the Tor proxy's host instead of the private address of the bitcoind – effectively running an empty onion service listening the Tor proxy's localhost.
LOCK(node->m_tx_relay->cs_filter);
                peer_relay_txes = node->m_tx_relay->fRelayTxes;
                peer_filter_not_null = node->m_tx_relay->pfilter != nullptr;
            }
            NodeEvictionCandidate candidate = {node->GetId(), node->nTimeConnected, node->nMinPingUsecTime,
                                               node->nLastBlockTime, node->nLastTXTime,
                                               HasAllDesirableServiceFlags(node->nServices),
                                               peer_relay_txes, peer_filter_not_null, node->addr, node->nKeyedNetGroup,
                                               node->m_prefer_evict, node->addr.IsLocal()};
            vEvictionCandidates.push_back(candidate);
        }
    }
    
    
    
    EraseLastKElements(vEvictionCandidates, CompareNetGroupKeyed, 4);
    
    
    EraseLastKElements(vEvictionCandidates, ReverseCompareNodeMinPingTime, 8);
    
    
    EraseLastKElements(vEvictionCandidates, CompareNodeTXTime, 4);
    
    std::sort(vEvictionCandidates.begin(), vEvictionCandidates.end(), CompareNodeBlockRelayOnlyTime);
    size_t erase_size = std::min(size_t(8), vEvictionCandidates.size());
    vEvictionCandidates.erase(std::remove_if(vEvictionCandidates.end() - erase_size, vEvictionCandidates.end(), [](NodeEvictionCandidate const &n) { return !n.fRelayTxes && n.fRelevantServices; }), vEvictionCandidates.end());
    
    
    EraseLastKElements(vEvictionCandidates, CompareNodeBlockTime, 4);