Query runs raw but not with Query Builder `->get()`

Here's the full code

public function search()
{
    DB::enableQueryLog();
    $params = request()->all();
    $query = MediatorResponse::select(['id', 'content']);

    $query->where(function($query) use ($params) {
        foreach ($params['private'] ?? [] as $val) {
            $query->orWhere('private', $val);
        }
    });
    
    if ($params['where'] === 'tags') {
        $query->where('tags', 'LIKE', "%{$params['q']}%");
    }
    elseif ($params['where'] === 'situation')
    {
        $response = app(MediatorResponse::class)->getTable();
        $pivot = app(Situation::class)->getTable();
        $situation = $this->morphModel->getTable();
        $searchable = $this->morphModel->searchable;

        // https://www.w3schools.com/sql/sql_exists.asp
        $query->whereExists(function($query) use ($pivot, $situation, $response, $searchable, $params) {
            $query->select("$pivot.id")
            ->from($pivot)
            ->where("$pivot.mediator_response_id", "$response.id")
            ->whereExists(function($query) use ($pivot, $situation, $response, $searchable, $params) {
                $query->select('id')
                    ->from($situation)
                    ->where("$pivot.model_id", "$situation.id");
                $query->where(function($query) use ($searchable, $params) {
                    foreach ($searchable as $column) {
                        $query->orWhere($column, 'LIKE', "%{$params['q']}%");
                    }
                });
            });
        });
    }
    $results = $query->get();
    dd(DB::getQueryLog());
    return response()->json(['success' => true, 'results' => $results]);
}

Using this workaround to force the binding... This solves the problem but the reason why the Query Builder doesn't do it himself persists.

$sql_with_bindings = \Str::replaceArray('?', $query->getBindings(), $query->toSql());
$results = DB::select($sql_with_bindings);