Thumbnail List Wrong Image Ratio RC.4

Since I updated to RC.4 all my thumbnail lists are forcing the images to be squared. Before the thumbnail would resize the image’s height and keep the ratio. Now both width and height are set to the same amount of pixels, losing the image’s ratio…

I use the same code as shown here: https://ionicframework.com/docs/v2/components/#thumbnail-list

I had to set the width property to “auto” in app.scss for .item-md and .item-ios thumbnail img to correct this.

Is this a known issue?