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.
{
    
}
void InterruptMapPort()
{
    
}
void StopMapPort()
{
    
}
#endif
void CConnman::ThreadDNSAddressSeed()
{
    FastRandomContext rng;
    std::vector<std::string> seeds = Params().DNSSeeds();
    Shuffle(seeds.begin(), seeds.end(), rng);
    int seeds_right_now = 0; 
    int found = 0;
    if (gArgs.GetBoolArg("-forcednsseed", DEFAULT_FORCEDNSSEED)) {
        
        seeds_right_now = seeds.size();
    } else if (addrman.size() == 0) {