Text Mandatory field is blocking update

Good morning.

if the Field collection module is setup as
- one field is textfield element: mandatory
- other fields or not mandatory
and if the content type using this collection is setup as
- widget: table
then when updating the content, it is impossible to save it unless the possible new row of the field collection is explictly removed.

The issue can not be reproduced is there is for instance another mandatory field of type node reference

Best regards,
Julien Thomas.