Errm, not sure what you're looking at there, as it's all set correctly. As per your original example, if there was a link to page 0 or page 1, they have a canonical of:
<link rel="canonical" href="https://invisioncommunity.com/forums/topic/442742-large-community-you-have-a-problems-with-sitemap/" />
Which makes sense, since those are all essentially the first page of the thread, so don't require (and shouldn't have) the pagination in the url for seo purposes. So all good so far.
But for page 2, the canonical is:
<link rel="canonical" href="https://invisioncommunity.com/forums/topic/442742-large-community-you-have-a-problems-with-sitemap/?page=2" />
Page 3 has a canonical to ?page=3, and so on.
On top of that, Invision also have the tags to let google know it's a paginated thread, which again is good seo, as google then knows to link the pages together as one set, and it may also show the page links in search. For instance on page 2, the tags are:
<link rel="first" href="https://invisioncommunity.com/forums/topic/442742-large-community-you-have-a-problems-with-sitemap/" />
<link rel="prev" href="https://invisioncommunity.com/forums/topic/442742-large-community-you-have-a-problems-with-sitemap/" />
<link rel="next" href="https://invisioncommunity.com/forums/topic/442742-large-community-you-have-a-problems-with-sitemap/?page=3" />
<link rel="last" href="https://invisioncommunity.com/forums/topic/442742-large-community-you-have-a-problems-with-sitemap/?page=8" />
So no need to rant, and no need to get someone to fix it for you, as it's already been done ?