Artifacts not working since three months!

Anyone else suffering from this issue: Usually I use artifacts for text summaries, which allows me to copy the summary directly to the Claude memory within a project. For some reason, since November 2025 Claude states it's generating an artifact, but it does not. Summaries are done inline in the chat and not as Markdown in an artifact. Somestimes I see HTML code or Markdown instructions at beginning and end of the summary, but all is written within the chat window. I deactivated any ad blocker, but am not sure if some security features of my browser prevent Claude from opening the artifacts windows within the chat. I use ChromeOS or macOS with MS Edge (for reasons! It didn't work with Safari either). I even asked Claude to run a tiny test artifact, but with no efforts. I am using Claude 4.5 Sonnet. Anyone has an idea what might cause this issue? I even tried to run a small example in a special tool project of Claude, and asked for a simple interactive app to run as artifact. It is a dice simulator from 1 - 6. What happened? Claude generated the HTML code for it in the chat, but not as an artifact. Usually the artifact window opened and after the code was written I got a visual app to run, but not any more. https://preview.redd.it/6u35gzz21cbg1.png?width=973&format=png&auto=webp&s=ba3965c9c110226470f2f84895e17077fedfb8d1