Corrupt Content View

I think I have a corruption being caused by Studio. I have been unable to reproduce this problem in a different Studio project, but it can be reproduced at will using this project:

https://connect.nuxeo.com/nuxeo/site/studio/ide?project=mastercard-basic-dm-nuxe

So I've decided to just file a bug using this.

Note: this has been reproduced on both OS X and Windows on multiple machines and with multiple versions of Nuxeo (7.2 and 7.3).

Here are the steps to reproduce:

• Install Nuxeo 7.2.
• Launch it, proceed through the Wizard and accept all defaults.
• Register to the project "mastercard-basic-dm".
• Activate Development Mode.
• Install nuxeo-virtualnavigation from the Marketplace (the Studio project has a dependency on this and I don't want to modify the project any further).
• Restart server.

• Go to the Studio Project.
• Select Versioning.
• Select the "beforeModifyDateAgg" tag.
• Revert to it.

• Deploy this to your 7.2 server.
• Access the "Search" tab.

It should be ok.

• Go to the Studio project.
• Open the "AssetSearch" Content View.
• Delete the Container labeled "Created".
• Save the changes.
• Update your server.
• Access the "Search" tab.

You should get an exception.

2015-04-22 16:40:41,584 ERROR [http-bio-0.0.0.0-8080-exec-1] [org.nuxeo.ecm.platform.web.common.exceptionhandling.DefaultNuxeoExceptionHandler] javax.servlet.ServletException: /incl/content_view.xhtml @85,16 value="#{contentView.pageProvider.hasAggregateSupport() ? contentView.pageProvider.aggregates : null}" /incl/content_view.xhtml @85,16 value="#{contentView.pageProvider.hasAggregateSupport() ? contentView.pageProvider.aggregates : null}": Error reading 'aggregates' on type org.nuxeo.elasticsearch.provider.ElasticSearchNxqlPageProvider`

This is only one example of a lot of strangeness that has been happening with this Content View. For example if I add a widget for dc:title, no results are found. I think this Content View has become corrupt somehow via Studio.

Disclosure: I have experimented with a Generic Search widget using the field /*+ES: OPERATOR(fuzzy) */ dc:title in order to demo some fuzzy searching. This was working fine on Monday, started failing Tuesday and has not worked since. But the point is I have added and removed the widget several times usually using the same name. This may be related?