Hi,

We think we have discovered a difference in the way the ContentArea items are being fetched in 8.6 compared with previous versions.

In our views we like to do the following (for various reasons):

foreach (var item in Model.MainContentArea.FilteredItems)
{
	var block = item.GetContent() as BlockData;
	@Html.PropertyFor(m => block)
}

After upgrading to 8.6 we realized that this caused an ArgumentNullException on a number of pages:

[ArgumentNullException: Value cannot be null.
Parameter name: subject]
   EPiServer.Web.Mvc.Html.IContentDataExtensions.RenderContentData(HtmlHelper html, IContentData contentData, Boolean isContentInContentArea, String templateTag) +370

It turns out that item.GetContent() returns null when a block is found in the FilteredItems collection, but not existing in the current language.

I'm not sure what changed, maybe the ContenteArea.FilteredItems property? I'm thinking it shouldn't contain references to blocks that don't exist in the curent language, but for some reason it does.

Anyway, we solved it by adding a check to see if block is null inside our foreach loop, but this wasn't needed prior to 8.6 and I haven't seen any mention of this function being changed in the release notes.

Is this change intentional or have we discovered a bug?