question about serp

Hello Yet Another Stars Rating plugin. First i want to thank you for making this amazing and useful plugin. I have one question. When i search my site with keywords star rating doesn’t show up in google Search results (I mean rich results with rating). are you going to make plugin update to add rating in results? But if i search in google by link star rating shows up. Why does it happen. How to fix it? I think there is nothing to fix about it. Why this doesn’t happen itself (to show ratings in search results in every case)

Thank you in advance dudo