[Function _n] What wrong?

This code of Woocommerce Plugin:

echo apply_filters( 'woocommerce_available_download_count', '<span class="woocommerce-Count count">' . sprintf( _n( '%s download remaining', '%s downloads remaining', $download['downloads_remaining'], 'domain' ), $download['downloads_remaining'] ) . '</span> ', $download );

but Them check is warning:

WARNING: Found a translation function that has an incorrect number of arguments. Function _n, with the arguments '%s download remaining', '%s downloads remaining', downloads_remaining, 'domain'

I see code here:

https://developer.wordpress.org/reference/functions/_n/

And my text domain is domain:

Warning: More than one text-domain is being used in this theme. This means the theme will not be compatible with WordPress.org language packs.
The domains found are domain, downloads_remaining

I only found downloads_remaining in echo apply_filters( 'woocommerce_available_download_count', '<span class="woocommerce-Count count">' . sprintf( _n( '%s download remaining', '%s downloads remaining', $download['downloads_remaining'], 'domain' ), $download['downloads_remaining'] ) . '</span> ', $download );

What wrong?

Start with the provided _n() call and the Theme Check translation warning, then inspect how the checker counts _n() arguments and identifies text domains. Reproduce the warning with the WooCommerce snippet and compare it with the WordPress _n() reference; done means the checker reports only an actual text domain and no longer treats downloads_remaining as one.