The WiFi service does not turn on
WiFi suddenly turns off when working with the Internet, after which it does not turn on. Sometimes a reboot helps. After updating or changing the operating system to Mojave, the WiFi service works fine, it does not turn off for about 1-2 months. After that, the problems reappear. I attach a video recording of the screen. The video shows Catalina OS has now been updated to BigSur the problem has not disappeared
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iMac 27″ 5K, macOS 11.6