Cannot remove bold from TOC style when adopted from heading

[MLD5000]

I'm using typical headings in specific paragraphs to create the Table of Contents entries. The TOC entries adopt the style of the associated heading/paragraph.

The paragraphs/headings I'm using have bolded text, which is propagated to the TOC - I have tried to remove the bold styling from the TOC but it doesn't seem to work:

paragraphStyles: [
          {
            id: "TOC1",
            name: "toc 1",
            basedOn: "Normal",
            next: "Normal",
            paragraph: {
              spacing: {
                line: 280,
              },
            },
            run: {
              size: 22,
              bold: false,
            },
          },
         ...otherStyles
        ]

The above styling config seems to work for everything except removing bolded text.

Is there another way to do this, is my implementation wrong, or this a bug?

[Pattriarch]

Same issue...