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.
for (CNode* pnode : vNodesCopy)
        {
            if (pnode->fDisconnect)
                continue;
            
            bool fMoreNodeWork = m_msgproc->ProcessMessages(pnode, flagInterruptMsgProc);
            fMoreWork |= (fMoreNodeWork && !pnode->fPauseSend);
            if (flagInterruptMsgProc)
                return;
            
            {
                LOCK(pnode->cs_sendProcessing);
                m_msgproc->SendMessages(pnode);
            }
            if (flagInterruptMsgProc)
                return;
        }
        {
            LOCK(cs_vNodes);
            for (CNode* pnode : vNodesCopy)
                pnode->Release();
        }
        WAIT_LOCK(mutexMsgProc, lock);
        if (!fMoreWork) {
            condMsgProc.wait_until(lock, std::chrono::steady_clock::now() + std::chrono::milliseconds(100), [this]() EXCLUSIVE_LOCKS_REQUIRED(mutexMsgProc) { return fMsgProcWake; });
        }
        fMsgProcWake = false;
    }
}
bool CConnman::BindListenPort(const CService& addrBind, bilingual_str& strError, NetPermissionFlags permissions)