Searching tickets

I keep finding that 'search' in Gitlab misses things. Example https://gitlab.haskell.org/ghc/ghc/-/issues/22715 mentions "Haskeline" (just look on that page) Yet when I go to https://gitlab.haskell.org/ghc/ghc/-/issues/ and search for "Haskeline", this ticket isn't reported. What am I doing wrong? Simon