Cannot wrap search query in parenthesis

[gsnedders]

e.g. (path:/css/css-display and exists(display contents)), https://wpt.fyi/results/?label=master&label=experimental&aligned&q=%28path%3A%2Fcss%2Fcss-display%20and%20exists%28display%20contents%29%29

This leads to a request to https://wpt.fyi/api/search which returns 400 ("Failed to parse query fragment as any of the existing search atoms in wpt.fyi/api/query/README.md").

We're passing the following body:

{
    "run_ids": [
        5130502731726848,
        5127139076079616,
        5170202456621056,
        5079107785719808
    ],
    "query": "(path:/css/css-display and exists(display contents))"
}

This is because the front-end is failing to parse the query:

Error: Failed to parse query: (path:/css/css-display and exists(display contents))

I would expect wrapping the query in parenthesis to be a no-op in terms of the parser.