The CollectionView is inserting "display=list-item" in _insertAndRenderModelView and the grid styling is modified to list.

In version 0.11.6 the code in _insertAndRenderModelView

            if( thisModelViewWrapped.children().length === 1 )
                thisModelViewWrapped.toggle( ! hideThisModelView );
            else modelView.$el.toggle( ! hideThisModelView );

            thisModelViewWrapped.toggleClass( "not-visible", hideThisModelView );

was replaced by

if( thisModelViewWrapped.children().length === 1 )
                thisModelViewWrapped.toggle( ! hideThisModelView );
            else modelView.$el.toggle( ! hideThisModelView );

            thisModelViewWrapped.toggleClass( "not-visible", hideThisModelView );

jquery toggle adds display:list-item and spoils the grid styling given in css.

[dgbeck]

@shankar-mahesh thanks for the report! However I am unclear on what the issue is here. I am squinting but the snippets above look identical, and I'n not clear on what the unexpected styling is exactly. Can you provide more information please (e.g. a diff, screenshot, code to reproduce, etc.)?