It can easily get a bit techy to correctly find & fix these kind of things.
My first guess is (it may be related to) a currency conversion or variant thing. Ideally; compare raw feed data, page content and schema. Do that for a few products and it might help to locate an issue.
Some feed apps generate feeds that seem to trigger this kind of thing more often. Sometimes a fix might be a theme tweak, or a feed config change. Sometimes a more robust fix may be to change to another feed app that has a bit more flexibility.
Full time Shopify SEO guy, based in NZ. Sometimes freelance outside the 9-5.