What is the best way to submit a bug?

[olukyanenko]

I believe I have found bug in Magento 2.1.3

I have found the same issue at github and add a comment to it.

https://github.com/magento/magento2/issues/8309

What is the best place to report issue?

Github or some other location?

[Mukesh Tiwari]

Hi @olukyanenko

Please visit following documentation Report an issue it should help you.