Home Assistant Operating System Update stalls at 12.3. Why?

I have installed Home Assistant on Rpi5-64. everything went well until update 12.3. From then on no new update was installed. However, sending a description of the error to the team using the form provided is far beyond my technical skills. What can I do to ensure that the updates are installed again? Version 13.2 starts but after a while “Update 13.2 available” appears again