Sidebar getting partially hidden behind the content block.

Summary

Sidebar getting partially hidden behind the content block.

Steps to reproduce

To reproduce it you need to open an issue with assignee) on a new page. After this just assign-unassign-assign without expanding it. You will then reproduce the bug.

P.S. Screen resolution is 1920x1200 (16:10). bandicam_2019-11-26_17-35-42-762

Example Project

(If possible, please create an example project here on GitLab.com that exhibits the problematic behavior, and link to it here in the bug report)

What is the current bug behavior?

Partially hidden sidebar.

What is the expected correct behavior?

Just a typical sidebar.