magento2 – Magento 2: Custom Instructions of Robots.txt is not working


We are facing an issue and need your guidance to solve that. The issue is that we have updated the custom instructions for robots.txt file as below

User-agent:*
Disallow:

But in the frontend, its showing as below

User-agent:*
Disallow: /

I have cleared and flushed the cache. So what could be the issue?

Any help will be appreciated!