The "No" intent suddenly does not work anymore

I have a skill live. Currently, I am in the process of building an update. I have uploaded the current update to the Developer Console. In the Developer Console, I have set that I want to open the Dev version on my Echo devices at home. All of that is working. However, what suddenly stops working are all the “No Intents”. Of course, I use the existing intents from Amazon. And in the live version, it works without any problems. In the current Dev version, however, they no longer work. Has anyone had this problem before?