@vueloiv Take a look into the “name” keys of the configured fields.
WPML stores them into a configuration array like this:
[
// 'meta_key' => 'translation option'
'my_custom_field' => 2 //translate
]
If there are fields with the same “name” (meta_keys) the setting will be overwritten.
Field name in documentation
I recommend to use unique names
