Do “switch_to_blog()” and “restore_current_blog()” re-run the filters?

The typical answer to anything switch_to_blog() is — no it shouldn’t, yes it is a mess. Simply put WP architecture doesn’t posses the capability of making such clean switch from one blog to another in the runtime. It’s a bit of wishful thinking — some things work, some very much break.

In your specific case it is a little puzzling why would query–related hooks fire, since the switch itself shouldn’t involve querying posts. The most reliable would be to dump how they are called up, for example using wp_debug_backtrace_summary().

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