Perch variants...

I'm having trouble with variants.

                perch_shop_product('events'); 

with <perch:showall /> gives me:

has_variants    true
_variant_opts   Member|4,Non-member|5
options 
Array
(
    [0] => Array
        (
            [title] => Member prices
            [precendence] => 1
            [optionID] => 2
            [optionTitle] => Member prices
            [optionPrecendence] => 1
            [optionDynamicFields] => {"title":"Member prices","precendence":"1"}
            [optionCreated] => 2017-01-04 12:56:33
            [optionUpdated] => 2017-01-04 12:56:33
            [optionDeleted] => 
            [perch_title] => Member prices
            [perch_precendence] => 1
            [options] => Array
                (
                    [0] => Array
                        (
                            [id] => 2
                            [title] => Member
                            [skucode] => MBR
                        )

                    [1] => Array
                        (
                            [id] => 3
                            [title] => Non-member
                            [skucode] => NON
                        )

                )

            [productvalues] => Array
                (
                    [0] => Array
                        (
                            [prodoptID] => 2
                            [optionID] => 2
                            [valueID] => 2
                            [optionTitle] => Member prices
                            [valueTitle] => Member
                            [valueSKUCode] => MBR
                            [valueOrder] => 1
                            [valueDynamicFields] => {}
                            [valueCreated] => 2017-01-04 12:56:33
                            [valueUpdated] => 2017-01-04 12:56:33
                            [valueDeleted] => 
                        )

                    [1] => Array
                        (
                            [prodoptID] => 3
                            [optionID] => 2
                            [valueID] => 3
                            [optionTitle] => Member prices
                            [valueTitle] => Non-member
                            [valueSKUCode] => NON
                            [valueOrder] => 2
                            [valueDynamicFields] => {}
                            [valueCreated] => 2017-01-04 12:56:33
                            [valueUpdated] => 2017-01-04 12:56:33
                            [valueDeleted] => 
                        )

                )

        )

)

But perch_shop_product_variants('events'); gives me nothing!

I've got debug enabled and there is a bit of the query that looks a bit odd (parentID IS NULL) :

SELECT tbl.* FROM ( SELECT idx.itemID, main.*, idx2.indexValue as sortval FROM swt_shop_index idx JOIN swt_shop_products main ON idx.itemID=main.productID AND idx.itemKey='productID' JOIN swt_shop_index idx2 ON idx.itemID=idx2.itemID AND idx.itemKey='productID' AND idx2.indexKey='title' AND idx.itemID IN ('1', '2', '3', '4', '5') AND idx.itemID NOT IN ('1', '3') WHERE 1=1 AND ((idx.indexKey='parentID' AND idx.indexValue=3)) AND idx.itemID=idx2.itemID AND idx.itemKey=idx2.itemKey ) as tbl WHERE (productDeleted IS NULL AND productStatus=1 AND parentID IS NULL) GROUP BY itemID, sortval ORDER BY sortval ASC

Any ideas?