Turns out it landed at BKO and then flew on as FAF4052, probably to France.

@ 16:15 UTC : Forget France, forget normal and probably : ce sont des Français !
It reappeared as FAF4054 flying from Nouakchott back into Africa back to Ndjamena.
There's word for people like that in France : des emmerdeurs.

@ 17:56 UTC : Landed at Bamako, again.

@ 21:37 UTC : Landing back at Ndjamena.

So, it flew :

Ndjamena - Bamako - Nouakchott - Bamako - Ndjamena