Reproduction:
1. Insert a picture.
2. Make a caption. For example, Caption:"The lovely day" and category:"pic."
3. In options, change "Caption order" to "Numbering first".
4. Insert cross reference somewhere in text: type:"pic.", Insert reference
to:"Category and Number"
5. Insert cross reference somewhere in text: type:"pic.", Insert reference
to:"Caption Text"

Point "4" should have resulted in "1. pic.", but actually gives "1", which is
the same as "Numbering" option.

Point "5" should have resulted in "The lovely day", but actually gives "pic. :
The lovely day"

If the Caption order is "Category first", everything works as expected.

It seems that category is mistakenly fused with caption text.