Reported on fr.wp. Verified so far in Win 7 (Chrome and FF).

You can use this page https://fr.wikipedia.org/w/index.php?title=Utilisateur:Elitre_%28WMF%29/Prove2&oldid=105329509 to reproduce.
Steps:

1. Place the cursor immediatly after "croisières", before the non-breaking space.
2. Add a space. This space is added after the cursor.
3. Press Right Arrow then Left Arrow to make the cursor move, but it is finally at the same place.
4. Add a space : the pawn appears in the link.
5. Again right arrow, then add another space : a second pawn appears after the link.
6. If you try to type text after the last pawn, only a pawns appears. No text.
   
   To have text written from right to left :
7. Place the cursor immediatly after "croisières", before the non-breaking space.
8. Add a space. This space is added after the cursor.
9. Press Right Arrow to make the cursor move.
10. Add a space : the pawn appears.
11. Again right arrow, then add another space (so efter the colon) : a second pawn appears.
12. Left arrow twice (cursor before the colon) and type text : it's written from right to left.

Version: unspecified
Severity: normal