Yesterday I wrote a CL [1] that was quite important as a DCHECK at startup was hurting developers. I got a review, CQ was green. I pressed "Submit to CQ" and went home.
This morning I found that the CL didn't land because:

---
Failed to submit 1 change due to the following problems:
Change 574854: Change 574854 is work in progress
---

I have to admit I didn't even get immediately what that was trying to tell me. A colleague had to explain me that I had to click the "start review" button explicitly.

Now the problem is: I definitely clicked on the "Submit to CQ" button. That definitely means that I intend to land that CL. I don't feel I need this sort of redundant safety where I have to "unlock" the cl first.
This was not an issue with Rietveld, ticking "commit" was just committing for realz.

[1] https://chromium-review.googlesource.com/c/574854/#message-e73cdf2f25428c48e3e3543cbf8edcce8206ad5e