merge request: file with mode change shows a collapsed diff that can not be expanded

Summary

A file's mode has been changed in a merge request from 644 to 755. GitLab shows the following:

Screenshot_2018-10-12_Use_nodm_rather_than_inittab_to_autostart_X11_DE_s___39____Merge_Requests___postmarketOS_pmaports

When clicking on "Click to expand it.", it shows a loading animation and then it shows the "Click to expand..." message again as if I never clicked it.

It is not really obvious that the mode was changed here.

Steps to reproduce

Create a new merge request where only the mode of a file gets changed, not the content.

Example Project

postmarketOS/pmaports!39 (diffs)

What is the current bug behavior?

See the screenshot above.

What is the expected correct behavior?

Show how the mode has been changed, do not try to display a diff. Maybe link to the file.