The following is speculation: If there was an electrical fire maybe it disabled the telemetry system before the last radio comm without them knowing? I don't k

The following is speculation: If there was an electrical fire maybe it disabled the telemetry system before the last radio comm without them knowing? I don't know all the systems on the plane and what the possibility is of an electrical fire going unnoticed for ~12 minutes. That's my only guess for why the transponder was turned off before last radio comm IF we assume this article/post's point of view is correct.