Diff changes between commits

Summary

Gitlab does not show all changes between two commits.

What is the current bug behavior?

I go into a specific file and load all its history, when comparing the file version of a specific commit with another, example, 101d7815 (old) with c873972b (new), in the gitlab difference view does not show all the real changes of the code, but if I take the contents of the files and for example compare them to an external tool then I can see all the changes that were made.

What is the expected correct behavior?

Show all the differences that have occurred from one commit to another.