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Garava  Suggested by CHONG BAI NING Moe 


Happy Comic  Suggested by robbo 

When you start creating a new font using FontCreator, you can import built-in outlines for some common characters. The numbers you showed us are part of the characters.

Watch this video from 3:00 for the numbers:
https://www.youtube.com/watch?v=FkRp2YEOnfM

What akira1975 says is most of the fonts by lazy designers will contain these default numbers.

examples:
https://www.dafont.com/fahri-rizal.d7119
https://www.dafont.com/alief-syahru.d8190

Ignore letters. Just numbers.

That's what I said, most of the fonts by this author have this number design.
That's because of default FontCreator numbers, as akira1975 said.

Nice catch!
Garava was created by "Bhikkhu Pesala, a Buddhist monk based in London".

http://luc.devroye.org/fonts-46103.html
https://forum.high-logic.com/viewtopic.php?t=1479
http://www.aimwell.org/pesala.html (which bottom right corner link "OpenType Fonts" redirects to Softerviews)