Internal links decrease dramatically

[canadaoptimize]

I have an unknown problem with my internal links. but after many searches on Moz community and other sites, I didn't find any answer.

the question is:

why homepage doesn't enough internal links like other pages?

the homepage internal links decrease dramatically in 2 months but it doesn't happen to other pages in the same domain

6l6Bh D0bC1

[Igor.Go]

Any changes to your website recently?
Moving to https? Setting www/non-www version as primary? Moving categories to subdomain? Removing pages?

Any of these may result in what happens to your website.

[canadaoptimize]

None of them. but the website is generated by angular js.