The $_POST array is merged into the $_GET array to make sure we don't get a HTTP 414 error. But because we modify the $_GET array other modules that create links based on the $_GET array receive way to much information. Attached patch clears the $_GET array from the keys added by this module.
Needs review
3.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
For me this is happening after filtering the view with ajax facet when there are these obnoxious parameters in pager links.
Attaching a patch that is compatible with patch #29 in facetapi pretty paths compatibility issue:
https://www.drupal.org/project/ajax_facets/issues/2070427#comment-15429453
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Support for Facet API Pretty Paths
Needs review