`params` sub-arrays will get ignored, if they are *not contiguous*

[nekromoff]

I have been bumping into this weird edge-case, where Brevo API would ignore sent params sub-array and send empty for-loop emails back.

The bug in Brevo API is this:

If a contiguous array is provided, Brevo correctly processes it via for loop, e.g.:

array:2 [▼ 
  "QUESTIONS" => array:6 [▼
    0 => array:8 [▶]
    1 => array:8 [▶]
    2 => array:8 [▶]
    3 => array:8 [▶]
    4 => array:8 [▶]
    5 => array:8 [▶]
  ]
  "TOTAL" => 6
]

However, if non-contiguous array is provided (array with gaps), Brevo incorrectly ignores this array in for loop, e.g.:

array:2 [▼ 
  "QUESTIONS" => array:6 [▼
    0 => array:8 [▶]
    1 => array:8 [▶]
    2 => array:8 [▶]
    3 => array:8 [▶]
    5 => array:8 [▶]
  ]
  "TOTAL" => 6
]

However, this is absolutely syntax-correct array in PHP.

Ayayay, Brevo!