Hi Skandha
I have attached a screen shot taken from a mobile browser.
The problem is with mobile browsers (Android). On a desktop computer it works fine.
Below is the code on the page with a test with and without HTML center tags
test
<center>[gallery type="circle" size="full" ids="XXX"]
</center>
test txt
[gallery type="circle" size="full" ids="XXX"]
test txt
<center>[gallery type="circle" size="full" ids="XXX"]
</center>
test txt
[gallery type="circle" size="full" ids="XXX"]
test txt