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(cs_totalBytesRecv);
    nTotalBytesRecv += bytes;
}
void CConnman::RecordBytesSent(uint64_t bytes)
{
    LOCK(cs_totalBytesSent);
    nTotalBytesSent += bytes;
    uint64_t now = GetTime();
    if (nMaxOutboundCycleStartTime + nMaxOutboundTimeframe < now)
    {
        
        nMaxOutboundCycleStartTime = now;
        nMaxOutboundTotalBytesSentInCycle = 0;
    }
    
    nMaxOutboundTotalBytesSentInCycle += bytes;
}
void CConnman::SetMaxOutboundTarget(uint64_t limit)
{
    LOCK(cs_totalBytesSent);
    nMaxOutboundLimit = limit;
}
uint64_t CConnman::GetMaxOutboundTarget()
{
    LOCK(cs_totalBytesSent);
    return nMaxOutboundLimit;
}
uint64_t CConnman::GetMaxOutboundTimeframe()