我最终使用了index_template 当CPT单页被错误地重定向到索引时，筛选以加载正确的模板，并且$_SERVER[\'REQUEST_URI\'] 包含CPT的段塞。像这样：

add_filter(\'index_template\', \'wpse300393_resolve_cpts_with_dots_in_name\');

function wpse300393_resolve_cpts_with_dots_in_name($templates = \'\'){
    if( strpos($_SERVER[\'REQUEST_URI\'], \'artwork\') !== false ){
        $templates = locate_template( \'single-artwork.php\' );
    }
    elseif( strpos($_SERVER[\'REQUEST_URI\'], \'artist\') !== false ){
        $templates = locate_template( \'single-artist.php\' );
    }
    return $templates;
}