Typically, the low-score posts are not hidden from the such views as "newest questions" on the meta sites, because on metas the low-score most of the time means disagreement with the question, and in more rare cases, it's quality. They are only hidden on the main page.
But with the new-nav, the main page also serves as "newest questions" and anything else (just the parameter
?tab=XXX changes), so without using the advanced search, it's impossible to see the low-score questions.
Proofs, the "newest question" as viewed using incognito and normal browsing:
MSO, logged in
MSE, logged in
Is it a bug, or intentional?
Also, it causes misunderstandings between ones using the old and the new navs.