Error ALSA hw:5,0

Volumio Information

Failed to open “alsa”[alsa]; Failed to open ALSA device “hw5,0”: No such file or directory
Volumio Version: 2.834
Hardware: Raspberry Pi 4B
DAC: Topping D50S

The failure happnes 3 to 4 times a week. I have to do factory settings to solve the problem.

Is the Dac switched on when the Rpi start?
When does it happen? While playing?

I must check it.

It happened when DAC was switched off. Now when DAC is on it works fine.
Thank you very much.