Not possible to retry after adding a todo failed

Summary

After adding a todo to an issue failed, it is not possible to try again without reloading the page.

Steps to reproduce

• go to an issue
• switch to offline in browser dev tools
• click Add todo in the issue

What is the current bug behavior?

The Add todo button stays disabled and keeps spinning:

failed-todo

What is the expected correct behavior?

After the request failed, the button is clickable again and the loading icon is hidden.