IP Camera POE - turn off errors

Hello
For security, when I arrive home, I deactivate the POE inputs of my switch (via SNMP) to stop the IP cameras.
So far, everything is working fine.
I have 2 questions:

  • in the logs, I have this error, can we avoid it?

Error getting new camera image from Camera XXX: All connection attempts failed
9:35:56 - (ERROR) generic - message first occurred on August 22, 2021, 19:30:23 and appeared 16561 times.

  • for the camera preview, the last image remains displayed. Is it possible to put an image so as not to have the doubt that it is well stopped?

Thank you

HA core-2021.8.7

nobody to help me?