Many thanks for the prompt feedback on the security updates everyone!
I've pushed the release button (well, actually I ran koji move v8.2-testing v8.2-updates xen-4.13.1-9.11.1.xcpng8.2 microcode_ctl-2.1-26.xs15.xcpng8.2. Don't try this at home.), and the security updates will be available within 5 minutes, identical to what you have tested.
I have not released the rest of the update train that is being tested (see this post), so let the testing continue!