Translatable not working for non translatable fields.

I have a progect with 2 languages, italian and english, some models may have some fields translatable and some other not traslatable. For example I have the model News with only 2 fields translatable: title and content: public $translatable = ['title', 'content']; If I try to update another field, for example "source", it has a strange behavior: it executes 2 query, the first one set the new value for source, the second one restores the old value. I attach a screenshot from Telescope.