Internal links from TOC zone not working in KB articles when include page macro is used

[Mian Siew]

I created article 1 in Confluence using the 'table of content zone' macro. The internal links work fine.

Then I created article 2 in Confluence by including content from article 1 using the 'include page' macro. The internal links work fine.

However, the internal links are not working in the KB article which comes from article 2. When I click on the link I got a Not Found error. This issue started yesterday.

Anyone facing the same issue?