Audio Randomly Stops Working on Reboot

After (re)boot I often have no playback (audio output). Also not shown in system settings / sound devices. But if I plug in a headphone, it appears immediately and stays on and works perfectly even after I unplug it.

I’ve experienced this before, and then it healed “on its own”, but now it’s happening again. I can’t connect it to anything. (Mysterious voice behaviour)

My system:
Operating System: Manjaro Linux
KDE Plasma Version: 5.26.5
KDE Frameworks Version: 5.102.0
Qt Version: 5.15.8
Kernel Version: 5.15.89-1-MANJARO (64-bit)
Graphics Platform: X11
Processors: 4 × Intel® Core™ i5-6200U CPU @ 2.30GHz
Memory: 7.7 GiB of RAM
Graphics Processor: Mesa Intel® HD Graphics 520
Manufacturer: Acer
Product Name: Aspire V3-372
System Version: V1.12

[balint@Aspire-V3 ~]$ inxi -A
Device-1: Intel Sunrise Point-LP HD Audio driver: snd_hda_intel
Sound API: ALSA v: k5.15.89-1-MANJARO running: yes
Sound Server-1: PulseAudio v: 16.1 running: yes

The AlsaMixer v1.2.8 always shows both Playback and Capture.

What shows alsamixer on console ?

Is there anything in the logs: journalctl ?

Yes, I’m sending the last one: journalctl -
No sound was after boot this time either. Only after plugging in an earphone for a moment. I plugged it in a minute or two after it started.
Some interesting lines:
Line 105: 2023. 02. 02. 18:58 pulseaudio stat(‘/etc/pulse/’): No such file or folder
Line 259: 2023. 02. 02. 18:58 systemd Closed Sound System.
Line 300, 301, 329-331
I have no idea, why this mystery. I am not an expert in this log. Many thanks for caring about my strange case.

This detail is the time to plug in the headphones:

2023. 02. 04. 18:10 wpa_supplicant wlp3s0: CTRL-EVENT-SIGNAL-CHANGE above=1 signal=-54 noise=-109 txrate=144400

/* Headphone plugged in : */

      1. 18:10 rtkit-daemon Supervising 3 threads of 1 processes of 1 users.
      1. 18:10 rtkit-daemon Successfully made thread 3133 of process 954 owned by ‘1000’ RT at priority 5.
      1. 18:10 rtkit-daemon Supervising 4 threads of 1 processes of 1 users.
      1. 18:10 plasmashell org.kde.plasma.pulseaudio: No object for name “auto_null”
      1. 18:10 plasmashell org.kde.plasma.pulseaudio: No object for name “auto_null”