Regression in Chef Client 13.7.16

we’re tracking a reasonably severe bug in 13.7 that will manifest itself if your cookbooks rely on manipulating hashes or arrays of attributes. is the tracking issue. Once we’ve got a solution we’ll be making a point release of 13.7 to fix this.
We apologise for the inconvenience, and will be holding a public post-mortem once the issue is resolved.