Multi-paragraph inline notes in markdown input are gobbled

[Witiko]

Explain the problem.
The markdown+inline_notes reader will recognize multi-paragraph inline notes, but it will gobble all paragraphs except the first:

$ pandoc -f markdown+inline_notes -t native <<< $'foo^[This is a footnote\n\nthat spans several paragraphs] bar'
[ Para
    [ Str "foo"
    , Note
        [ Para
            [ Str "This"
            , Space
            , Str "is"
            , Space
            , Str "a"
            , Space
            , Str "footnote"
            ]
        ]
    , Space
    , Str "bar"
    ]
]

Since inline footnotes are inline elements, I would expect that multi-paragraph notes not be recognized as notes:

[ Para
    [ Str "foo^[This"
    , Space
    , Str "is"
    , Space
    , Str "a"
    , Space
    , Str "footnote"
    ]
, Para
    [ Str "that"
    , Space
    , Str "spans"
    , Space
    , Str "several"
    , Space
    , Str "paragraphs]"
    , Space
    , Str "bar"
    ]
]

Pandoc version?
Manually built using the witiko/pandoc-devenv Docker image from Pandoc source code at commit ec27946:

$ pandoc -v
pandoc 2.18
Compiled with pandoc-types 1.22.2, texmath 0.12.5, skylighting 0.12.3,
citeproc 0.7, ipynb 0.2, hslua 2.2.0
Scripting engine: Lua 5.4
User data directory: /root/.local/share/pandoc
Copyright (C) 2006-2022 John MacFarlane. Web:  https://pandoc.org
This is free software; see the source for copying conditions. There is no
warranty, not even for merchantability or fitness for a particular purpose.

[jgm]

From the manual:
"Inline footnotes are also allowed (though, unlike regular notes,
they cannot contain multiple paragraphs). "

[jgm]

I agree with your judgment here.