Other contrib modules that extend/improve pager features (sometimes) implement hook_preprocess_pager() which won't be called with the current version of Views Infinite scroll because it uses its own theming function and template file. And/or rely on certain array elements, like 'items', to be filled, which is not the case with the current version of Views Infinite Scroll. Making them incompatible.
Install for example
https://www.drupal.org/project/pager_metadata →
It won't reach its goal when your View uses the Infite Scroll pager.
Extend the full pager.
None, if the option to automatically scroll is on.
If automatic scroll is not on, a full pager is shown instead of only a Load More button.
Postponed: needs info
1.0
Miscellaneous
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Is this still an issue with 2.0.x? If yes, please update the version and set the status active again with clear steps or (best) with a test showing what's broken.
2.0.x is the active development branch.
If nobody replies, we should assume this is fixed and close this issue outdated.
Thanks!