This is exactly what my local SC stated to me - always available WiFi is key to receiving the latest updates. This said, I made modifications to ensure good WiFi overnight, but according to my Teslafi account, my MY just sleeps the nights away ...If enough community support comments on a problem, Tesla notices and it might get resolved.
But you really just need a good wifi link every night.
PS. Like all computers, many issues resolve after a “full double button” reboot And an overnight wifi link. Or perhaps it’s just the restful sleep I get that night, but….