Update fields does not consider 2nd level of TOC, only including first level contents

Hello. When we use UpdateFields(), the TOC are not created correctly. It considers the first level of contents, but completely misses the sublevels.
In the attached template, it considers level 1 and 2, but sublevels 2.1, 2.2 and so are not included.
Could you please help with this issue.
TEST TOC ISSUE - Anonymised.docx (33.1 KB)

@ruben.manjarrez.tr
We have opened the following new ticket(s) in our internal issue tracking system and will deliver their fixes according to the terms mentioned in Free Support Policies.

Issue ID(s): WORDSNET-27045

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