Local Params for Stats field

[Iana Bondarska]

Hi,
I'm trying to use localparams for stats component on Solr 4.4, exact query:
q=*:*&core=hotel_reviews&collection=hotel_reviews&fq=checkout_date:[* TO
*]&fq={!tag=period1}checkout_date:[2011-12-25T00:00:00.000Z TO
2012-01-02T00:00:00.000Z}&fq={!tag=period2}checkout_date:[2011-12-25T00:00:00.000Z
TO
2012-01-02T00:00:00.000Z}&rows=0&stats=true&stats.field={!ex=period2}checkout_date

and it fails with error "unknown field" checkout_date.
Should localparams for stats field be supported for v. 4.4?
If I run same query for v.4.8 -- it returns result w/o error

Best Regards,
Iana Bondarska