Frontend "crash" after several hours at random

Even though I cannot pinpoint the exact moment I believe my problems started with upgrade to OS 15.
Every now and then, my Home Assistant front end crashes and cannot be accessed. Neither externally, nor on internal network.
The back-end works fine:

  • Samba works;
  • SSH access works
  • Observer is happy
    *Supervisor: Connected
    *Support: Supported
    *Health: Healthy
  • No gap in history (beyond the 1-minute restart-period)

Through SSH : ha core restart seems to be processing forever, I need to go the ha host reboot to get it back up.

After rebooting I end up with a clean log.
How could I look for the source?

Core 2025.4.2
Supervisor 2025.04.0
Operating System 15.2
User Interface 20250411.0

Generic x86-64, 5% of CPU used in average, 8Gb RAM (+/- 18% use)

After further investigation, it seems that the Landroid integration is the most probable source of the issue as per: MQTT disconnected - problems (re-)connecting MQTT and resulting 100% CPU usage · Issue #797 · MTrab/landroid_cloud