I installed 7.1 community edition with ansible on CentOS 8. It's running very well and fast but it doesn't create preivew icons/thumbnails of documents. Does it still exists because I like the gallery view with the preview of the document very much. I hope you understand what I mean
I am not to sure it is your problem, did not test it on ansible deployment. But it's have the same tranformer as a container deployment and after first view in the Share should automatic create child nodes: cm:doclib(png) for details view and cm:imgpreview(jpg) for gallery view.