A couple of months ago, Google stopped showing the Google Posts in its top location, somewhere over the fold and in the local business panel. This made the performance of the Google posts to drop drastically in time. Now, Google might be on its way towards testing regarding moving up the Google posts.
Amy Toman put up a post on Twitter that had several screenshots of the Google testing. It showed many of the Google posts back in their earlier position. However, some of the SEOs also tried to replicate this for all the examples and they all came at the bottom of the local panel. It might be due to the reason that Google is carrying out a limited test regarding bringing the Google posts back to the top of the local panel once more.
Forum discussion at Twitter.