QML enum removed on save with autoformatting

I've "Enable auto format on file save" enabled.
While trying to use enum it gets deleted on save!

import QtQuick 2.9

Item
{
    enum DoNotDeleteMe
    {
        Yolo
    } 
}

After ctrl+s

import QtQuick 2.9

Item {

}

The "Tools > QML/JS > Reformat File" action has the same effect.