"author is one of" filter is broken for non-project members

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Steps to reproduce

1. open issue page: https://gitlab.com/gitlab-org/gitlab/-/issues
2. select author filter
3. select is one of
4. type @winh
5. press enter

What is the current bug behavior?

no matches found is displayed (see also #31299) and after pressing enter, search field is cleared

What is the expected correct behavior?

is one of works for non-project members

Possible fixes

the bug is in the frontend because building the URL manually works: https://gitlab.com/gitlab-org/gitlab/-/issues/?or%5Bauthor_username%5D%5B%5D=winh