Branches made from tag in develop do not merge back to develop

[TU_DevOps]

We've started working with tags on our develop branch in a repository in our CI/CD pipeline. When we need a fix on that tag, we create a branch from the tag.

What has (seemingly) happened is whenever we make a fix on the newly created branch, we lose the connection to the develop branch (the fix isn't automatically merged back to develop anymore). Because of this, we have to create new commits/PRs to get them on the develop branch (the new commits obviously weren't tagged properly anymore either).

It seems as if the branches from tags 'lose' their connection to their origin.

Is there a setting in the UI to fix this or is there something that we haven't properly configured?