Filter nin in relation

hi!
i create relation manyway:
image

I am trying to filter only those records that do not have the date 2021-05-11
http://localhost:1337/project-requests/?parse_dates.date_nin=2021-05-11
but this example still finds, since there is 2021-05-10

http://localhost:1337/project-requests/?parse_dates.date_ne=2021-05-11
works similarly

plz help!

graphql too has this problem