App logo not clearly visible on my home screen

After clicked 'Share your published app`, I opened the URL on my iPhone and installed it to my home screen with 'Add to Home Screen.’
Until last week, the logo of the app I set up was clearly visible on the home screen, but when I installed it again this week, the logo is blurry. I tried another logo and the same thing happened. Does anyone have same issues and know why?

Hi @ozDigitalCreator

I encountered this issue before, but it resolved itself. Try clearing your browser cookies and saving again. This might help you.

Thanks
Shantanu