G_head does not produce node info replies!

Hi. Before I investigate and issue a bug report, can somebody check this please on recent SC. I’m running the slightly older 3.10.2. Here, I have a severe case where a /g_head reorders nodes but does not inform the client about the tree changes. To reproduce:

s.quit;
s.boot;
r = RootNode(s);
r.dumpTree;
/*
NODE TREE Group 0
   1 group
*/
s.dumpOSC;
(
f = { |msg, time, addr|
    if(msg[0] != '/status.reply') {
        "r: %\n".postf(msg);
    }
};
thisProcess.addOSCRecvFunc(f);
);
SynthDef(\main,  { Out.ar(0, DC.ar(0)) }).send(s);
SynthDef(\meter, { Out.ar(0, DC.ar(0)) }).send(s);
a = Group.tail(r);
b = Group.head(a);
Synth.tail(a, \main);
Synth.head(b, \meter);
Synth.head(r, \meter);
r.dumpTree;
/*
NODE TREE Group 0
   1004 meter
   1 group
   1000 group
      1001 group
         1003 meter
      1002 main
*/
s.sendMsg("/g_head", 1000, 1001); // NO REPLY !!!
s.sendMsg("/g_tail", 1000, 1001); // ok, /n_move
s.sendMsg("/g_head", 1000, 1001); // again, NO REPLY
r.dumpTree;
/*
NODE TREE Group 0
   1004 meter
   1 group
   1000 group
      1001 group
         1003 meter
      1002 main
*/

As you can see from the queryTree, the tree order has changed, but the line // NO REPLY !!! here means I’m not getting any client side OSC info on that change. What might cause this, or is it fixed in recent SC? Thanks!

Same problem in SC 3.12.1 :grimacing:

Opened an issue: https://github.com/supercollider/supercollider/issues/5579