Cannot check off Markdown tasks wrapped within <li></li>

Summary

I created some issues with a checklist of tasks in the issue description. The checklist is placed inside a Markdown table so I used the following syntax:

| Some column | Tasks |
| ----------- | ----- |
| Some text   | <ul><li> [ ]Some task</li><li> [ ] Another task</li><ul> |

Now everytime I try to check one of the tasks off, the following error message appears:

Someone edited this issue at the same time you did. The description has been updated and you will need to make your changes again.

This only happens if the task is wrapped inside <li></li>. It doesn't matter if the list is inside a table or not. Same problem if the tasks are inside a comment.

Steps to reproduce

• Create new issue in project
• Add some tasks wrapped inside <li></li> like so

<ul><li> [ ] Some task</li><li> [ ] Another task</li><ul>

• Click Submit and try to check off the task

What is the current bug behavior?

• An error message pops up when checking off a task
• After page reload, the task is unchecked again

What is the expected correct behavior?

• The task should remain checked off

Output of checks

This bug happens on GitLab.com