Attributes are case sensitive and the dropdown for variations doing the same thing. But following method is alerting
“Sorry, no products matched your selection. Please choose a different combination.”
Problem found in this method:
`wc_variation_form_matcher.variations_match( variation.attributes, settings )`
Its matching lowercase with capitalized values. Please fix it, else we have to enter all small values in attributes. Or alternatively you can give a tooltip for attributes textarea that keep all small.
WooCommerce Product Variation (Attributes) – Bug