What is the make and model of the device that serves as your Wi-Fi
access point (AP)?
Does the AP have the ability to do a radio channel congestion survey?
Is the AP configured to automatically select a low-congestion channel?
Is the AP stationary?
What is the make and model of the computer "buster"?
What is the make and model of the Wi-Fi interface in "buster"?
Is "buster" stationary?
Please run the following commands as root and post:
# cat /etc/debian_version
# uname -a
On "buster", I would look for clues in /var/log . Post any interesting
snippets.
Thank David, but my problem disappear, i don't why