Page loses images if default language is French
Then I found the bug
It is in file lang/fr/language.php
line 3816
"Anchor Name" => "Nom de l'Ancre",
should be
"Anchor Name" => "Nom de l Ancre",
it is the apostrophe ' that cause the problem
It is correctly translated and this apostrophe used many time, but here it is creating a bug in the WYSIWYG editor