Does it only happen when you are rotating the sun? Or generally?Which Corona version is this?What is your CPU?I just checked and I am not experiencing this problem here.
Do you mean the Corona Sky map? https://coronarenderer.freshdesk.com/support/solutions/articles/5000516719
Corona sun is always connected with sky, so when you rotate sun, the sky updates accordingly. See this if you want to align sun with hdr:https://coronarenderer.freshdesk.com/support/solutions/articles/5000516732And there was also this:https://forum.corona-renderer.com/index.php/topic,7602.msg50861.html#msg50861