I filed https://github.com/WebKit/WebKit/pull/1584 and since it was already marked as "unreviewed" as it was just a WPT import, I immediately added the `merge-queue` label on the PR after its creation. Checking back on this PR many hours later, there was not bot running to land the patch. Aakash eventually removed and re-added the label which triggered the appropriate action.
Looking at the timings, you had the misfortune of trying to apply the `merge-queue` label yesterday when we ran out our API limit on the webkit-early-warning-system account. You also applied the label at around the same time I disabled hooks to dig into possible mitigation for our API limit, https://bugs.webkit.org/show_bug.cgi?id=241698 was the solution I ended up deploying this morning.