Unexpected result on big dataset

[benjdv]

With big dataset (>1000000 rows) url_parse produce unexpected results.
Example:
SELECT * FROM ( SELECT R.Url, R.f.host as host FROM ( SELECT T.Url, url_parse(T.Url)) AS f FROM ... AS T) AS R) ) WHERE host LIKE '80to%' LIMIT 1;
+----------------------------------------------------------------------------------+-----------------+
| Url | host |
+----------------------------------------------------------------------------------+-----------------+
| http://patriot-auto.ru/addnews.html | 80togh-pro.rozb |
+----------------------------------------------------------------------------------+-----------------+

Although
SELECT t.p.host FROM (SELECT url_parse('http://patriot-auto.ru/addnews.html') AS p) AS t;
+-----------------+
| EXPR$0 |
+-----------------+
| patriot-auto.ru |
+-----------------+