The Meow Lightbox 'Output Buffering' setting needs to be disabled.
The Meow Lightbox “Output Buffering” setting needs to be disabled.

The Meow Lightbox plugin has an “Output Buffering” setting that – if enabled – causes facets to malfunction, caused by JSON errors.

There will also be “JSON.parse: bad escaped character” errors in the Console after filtering. Make sure to keep this setting disabled.