impossible to delete secondary category

Hi,
i believe that i found an issue in the last release FLEXIcontent v3.2.1 (11/09/2017)
When you edit an entry with two categories affected.
If you try to delete the secondary categories in Assignements table, when you save and close, the secondary category is not deleted.

To circumvent this, you can affect the same secondary category as the main category.
Then, when you save with main category and secondary category identical, you obtain secondary category empty.

Could someone test this and confirm this issue?

Hello Georgios,
Sorry for the time to come back (i had personal impediment).
Thank you verry much for your fast processing about this issue.
i tested it in backend and in frontend : the trouble has completely disappeared.
As usual, your fix is perfect.
I tried to look at your changes in the code, it's very impressive to see as you master the imbrications between the different parts of the functions.
Accept my respect Master Georgios.