Hey, this happened to me. The reason was that one of my older phone numbers was available to Google somehow, and it made that number a backup number to Fi. So w

Hey, this happened to me. The reason was that one of my older phone numbers was available to Google somehow, and it made that number a backup number to Fi. So when I dropped a call, it made a call to that old number, which is now owned by someone else (A nice lady who even helped my wife debug what was going on.).