TempoClock time jitter (on OSX) when e.g. opening helpfile/browsing the web?

After a long time I am looking into Pdef/Pbind again and notice that with default s.latency (0.2), I get considerable jitter of up to 0.5 seconds when I am doing other things on the machine like opening a helpfile in the IDE, or browsing the web.
I wonder if this common behaviour or if I am doing something wrong (apart from increasing the latency)?

Thanks in advance for your thoughts

Here’s some super simple test code that results in occasional late messages (see below)

SynthDef(\sine, { arg out, freq, attack=0.01, decay=1, amp=1, pan;
	var snd, env, u=1;
	env = EnvGen.kr(Env.perc(attack, decay), 1, doneAction:2);
	snd = SinOsc.ar(freq, 0, amp * env);
	OffsetOut.ar(out, Pan2.ar(snd, pan));

Pdef(\a, Pbind(
	\instrument, \sine,
	\note, Pseq((0..11), inf),
	\octave, Pseq([5, 6], inf),
	\decay, 0.1,
	\dur, 0.25
late 0.042076207
late 0.515819082
late 0.265819082
late 0.015819082
late 0.067156624
late 0.043025562
late 0.053317708
late 0.053405208
late 0.245571395
late 0.016904812
$ system_profiler SPSoftwareDataType SPHardwareDataType

    System Software Overview:

      System Version: macOS 13.6.3 (22G436)
      Kernel Version: Darwin 22.6.0
      Boot Volume: Macintosh HD
      Boot Mode: Normal
      Computer Name: XXXX
      User Name: XXXX
      Secure Virtual Memory: Enabled
      System Integrity Protection: Enabled
      Time since boot: 1 day, 18 hours, 36 minutes


    Hardware Overview:

      Model Name: MacBook Pro
      Model Identifier: MacBookPro18,3
      Model Number: Z15G002EZD/A
      Chip: Apple M1 Pro
      Total Number of Cores: 10 (8 performance and 2 efficiency)
      Memory: 32 GB
      System Firmware Version: 10151.61.4
      OS Loader Version: 8422.141.2.700.1
      Serial Number (system): XXXXX
      Activation Lock Status: Enabled

Might be this: Scheduling problems on Apple M1 · Issue #5948 · supercollider/supercollider · GitHub resp. scsynth/supernova: fix thread priorities by Spacechild1 · Pull Request #6043 · supercollider/supercollider · GitHub.

Can you try a develop snapshot?

Could you check the following post and the previous one by @jamshark70 in the same thread?