About Unnatural inbound Link pattern?

We've removed all our unnatural links after getting hurt from google manual penalty for Unnatural links. But google is still considering links on Branded term coming from the Author Bio as an unnatural link pattern.
For example,
"XYZ working as a reactjs developer at https://www.abc.com/ which deals in a mobile app solution. XYZ also likes to write on different mobile technologies and with keen interest on mobile app development platforms."
Google identify link on abc.com as an unnatural link. How come link on Branded term is considered as a Unnatural Links?

In order to give more clarity about our link pattern You can visit https://searchengineland.com/guide/google-penalties/unnatural-inbound-links Author Bio section, Our Author Bio is just similar as it is i.e Backlink is coming from Branded term from the Author Bio.

Let me know if you have experienced such manual penalty like the way we're experiencing? Any Help would be appreciated.

No, I am working on so many websites, but still didn't face any issue.

May be you guys did the link building too agressively. I use to give link in author bio some times but not every time.