I have created a simple Custom Components (a button) and deployed on cloud and added this component on a page.
Now I have refreshed the page. Button is not visible. It only shows the box where button was added.
I tried with examples as well. Facing same issue. How can I fix it ?
It’s happening recently to me as well, from time to time.
It looks like a rendering issue; let’s see if it’ll disappear after some updates.
Thanks so much for reporting this and welcome to the Community @Ambuj_Kumar! 
@abusedmedia and @Ambuj_Kumar, I am trying to rule out a regression from a previous fix. When the button does not show up, can you try resizing the browser window? This sometimes forces the component to re-render. Does it appear after you resize?
Which browser and version are you using? Have you tested in a different browser to see if the behavior changes?
Thanks for sharing these details. They will help me investigate further! 