Can't remove category from post while bulk editing

[Fleuv]

Consider the following bulk selected posts:

table 1

+-------+-----------+
| Name  | Category  |
+-------+-----------+
| P1    | A         |
| P2    | A         |
| P3    | B         |
+-------+-----------+

With this selection I performed 2 simple actions.

What I did first was adding category C. In this case both category A and B where not checked in the bulk edit form. The resulting after this first bulk action was the following:

table 2

+-------+-----------+
| Name  | Category  |
+-------+-----------+
| P1    | A, C      |
| P2    | A, C      |
| P3    | B, C      |
+-------+-----------+

The second bulk edit action I wanted to perform on these posts was removing category A. Again neither A, B or C was checked in the bulk edit form. So I tried to check and again uncheck the category called A. Unfortunately I got the same result as shown in table 2.

[SergeyBiryukov]

Hi @Fleuv, welcome to Trac! Thanks for your report, we're already tracking this issue in #11302.

In the meantime, ​Batch-Move Posts plugin might be helpful.