Positive button not showing up with MultiChoice AlertDialog

Question

I have a multichoice alertdialog that's displaying a checklist of ~ 20 items, and 2 EditTexts, and positive button. It perfectly works when I display only ~ 8 out of the 20 items, but when I try to display the whole checklist, the 2 EditTexts and the positive button don't show up. Here's the method that creates the dialog.

fun newInterfacs(view: View) { //fait apparaître un pop-up qui permet d'entrer les différents paramètres pour créer une nouvelle interfacs
        val equipes = arrayOf("ISEP", "CKO", "CP", "CdS", "AGRO", "Fronta", "CS", "CPSY", "CECS", "CELB", "Caré", "CéPHA", "CGéo", "CDH", "CD", "CM", "La Liégeoise", "CJC/CPL", "CPS", "CI", "CEBULB", "ACE")
        val selectedList = ArrayList<Int>()
        val builder = AlertDialog.Builder(this)
        val inflater = layoutInflater
        builder.setTitle("Nouvelles Interfacs")
        builder.setMultiChoiceItems(equipes, null
        ) { dialog, which, isChecked ->
            if (isChecked) {
                selectedList.add(which)
            } else if (selectedList.contains(which)) {
                selectedList.remove(which)
            }
        }
        val dialogLayout = inflater.inflate(R.layout.custom_view, null)

        val sport  = dialogLayout.findViewById<EditText>(R.id.sport)
        val date  = dialogLayout.findViewById<EditText>(R.id.date)

        builder.setView(dialogLayout)
        builder.setPositiveButton("OK") { _: DialogInterface, _: Int -> finish(view, sport, date, selectedList, equipes) }

        builder.show()
    }

And here's the custom_view layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <EditText
        android:id="@+id/sport"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Entrez le sport"/>

    <EditText
        android:id="@+id/date"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Entrez la date"/>
</LinearLayout>

Is there anything I can do about it or the checklist is simply too long ?