We have were we use the views_block_area module to place the facet block inside the view header.
This causes problem because the /views/ajax and /facets-block-ajax AJAX requests both update the same HTML.
If /views/ajax finishes first, it rewrites the blocks ID and then the replace command returned by /facets-block-ajax does not find the block to replace.
(This in turn makes Drupal.detachBehaviors() call the detach function of behaviors with context = document, which causes all sorts of problems.)
But in this scenario, we don't actually need to call /facets-block-ajax because /views/ajax already updates facets since they are inside the view.
Use views_block_area to place a facet block inside a view header.
Enable AJAX on the view.
Click on a facet link and inspect requests.
Two AJAX requests are sent and their response both manipulate the same HTML.
facets-views-ajax.js should not send the request to /facets-block-ajax if the facet blocks are inside the view.
Active
2.0
Code
Since this is in the 2.x version of facets and it is regarding ajax, I'm going to close this issue. We are only supporting ajax with views in facets 3.x.