Problem (or bug?) with method remove() by collection of nestedGrepStyles

Hi together,

I think I found a bug with method remove() for nestedGrepStyles with paragraphStyles.

I want to remove all nested Grep styles in a paragraph style.

This will not work:

var doc = app.documents.add();
var paraStyle = doc.paragraphStyles.add();
for(var n=0;n<4;n++)
{
    paraStyle.nestedGrepStyles.add();
};
try
{
    paraStyle.nestedGrepStyles.everyItem().remove();
}
catch(e)
{
    $.writeln(e);
};
// Error: Die angeforderte Aktion konnte nicht ausgeführt werden, da das Objekt nicht mehr existiert.
// $ID/ObjectDeletedError

However what is working:

A loop through the array of nested Grep styles to remove them

var doc = app.documents.add();
var paraStyle = doc.paragraphStyles.add();
for(var n=0;n<4;n++)
{
    paraStyle.nestedGrepStyles.add();
};
var nestedGrepStylesArray = paraStyle.nestedGrepStyles.everyItem().getElements();
var arrayLength = nestedGrepStylesArray.length;
for(var n=arrayLength-1;n>=0;n--)
{
    nestedGrepStylesArray.remove();
};

Tested with InDesign CC 2017 v12.0.0.81 on Mac OSX 10.10.5.

Can someone confirm this?

Regards,
Uwe

FWIW: I cannot create tags with camel-case writing like nestedGrepStyles or everyItem().
Oh Jive! That's ridiculous…