Optimize visualization of comments during a code review

I help maintaining a GitLab CE on prem instance and am receiving requests regarding the comments in a code review process I would like to quote here:

During the review process I comment a lot on the code.

After some adaptions have been made and some more commits follow, those comments are not connected to the code anymore.

With that it is almost not possible to keep track of code changes and makes the review process very hard and error-prone.

The comments should stay at their place in the code (as far as possible, if code gets removed there couldn't be any comment ) even if there are a lot of commits following.

I must agree that this is not optimal and create this issue to maybe start a discussion if and how this could be improved.