views filter criteria does not work for entity reference field (equal to)

Hi there,
I added an entity reference field (after installing EVO module) to a commerce product, which was the title of a node called schools. In this case it was Malvern.
When creating any view for this commerce product type, i can add this field, and it shows up in the preview (see screen shot).
However, when I want to filter for it, by setting equal to value: Malvern, this filters out all results when it should still display the malvern entry. When I set the school field filter to is not NULL, this product shows up, so something is there. However I can not filter for the same value as is listed in the preview. I have checked my spelling, made sure there are no hidden spaces, and tried upper case and lower case variation., but could not match the value. Any ideas on why the value displayed in the preview (Malvern) cannot be filtered for? Is it something to do with using Entity references as fields?