One core 100% use linux client

Nextcloud server version 25.0.4, client 3.7 (linux , from PPA)
Operating system and version : Ubuntu 22.04.2

Description :
One core of the CPU is being used for 100%,

NC icon menus are not responding.
Syncwheel stopped spinning
System monitor shows one CPU-core 100%,
No network activity.

Is this the first time you’ve seen this error? N . have it for 3 weeks now.

Steps to replicate it:

  1. start Nextcloud from the menu
    after a few seconds , NVC freezes.

Looking forward to some direction where to search for a fix, tnx.