Even the blank spaces in jira can cause things to happen!
Accidentally click on some white space? Well too bad, we’ve closed whatever you’re looking at, even though you’re not in a modal. Oh and also, you’ll need to wait 30-seconds for this new page to load, and you can’t just bail out and go back a page, because your browser can’t hold the previous page in cache/memory properly because it’s some overly-complicated JS app.
Azure DevOps is the same if not worse. I'm forever expanding or contracting the Description and Acceptance Criteria as there are no colour shades differentiating the sections - you have to watch the cursor change.
Then I wonder where the Description and Acceptance Criteria are for the next User Story, because it remembers that you (accidentally) contracted the Description for User Story X therefore you obviously don't want to see it for any others...