i just realize something...
When the problem occur, Both emails forms are in the same language...
If i do a test from French and English menus, we will receive email forms only in one language (french or english - random) but...
- If the email form is in English, the english test will appear.
- If the email form is in French, the french test will appear.
Exemple : http://prntscr.com/ktm64z
I disable the system caching and clear the cache, but the problem still there...