Dropdown different than search page results

Hi,

On https://hollandtyre.eu we’re using the AWS-plugin for searching the products. But sometimes the results in the dropdown are different than the results on the page (after pushing enter).

For example when I’m searching for ‘420/85r34’ there are a couple of results in the dropdown, but on the search page no products have been found. Maybe the slash is a problem, because when I’m trying to search ‘Alliance’ there is no difference.

Do you have any idea how this could be solved?

Kind regards,
Jeroen