I've had LMDE6 installed since it's release day and everything has been fine. For the past week it's been dropping my wifi card randomly. It is not recognized by rfkill nor lspci after it happens. Only reboot helps.
Does anyone know why it might happen? Kernel is 6.1.0-21-amd64 but I don't know has the kernel been updated recently.
I'd start with checking logs with journalctl as a privileged user. If the device disappears, there should be logs about it. Maybe that will point the way.