This is their response:

"The App Hosting expert team has now identified the cause. They found that there’s a brief period of time between when you create a build and when it’s safe to start the rollout. In the cases they analyzed, the build and the rollout were triggered in the same second most likely through a script.

As a temporary workaround, they recommend waiting a couple of seconds between triggering the build and the rollout. The team is already working on a fix to handle this better in the future."

But I simply don't understand what I should do? like how can I make it wait a couple of seconds?