NamelessWonder commented about FR24
Perhaps anomalies are to be expected, given that this is unofficial data, but to see 2 reciprocal tracks in the surrounding area of the event under question, AND within a few minutes of the disappearance seems somewhat . . . . odd.
Not for FR24!! Bear in mind that the data may be aggregated from more than one source and the processing, with time delays can give variable output.
When watching friends aircraft leaving/arriving, I have often seen the track suddenly jump ahead of the a/c and make it look as if the a/c has done a complete circle and come back to the identical position. Also, when an aircraft does circle. the tracks recorded by FR24 is jagged. Looking at at short time periods of FR24 data may not be helpful.