Hi Community,
I'm experiencing an issue where editing any flow that contains an AI Builder 'Run a prompt' action causes the New Designer to completely freeze and show an 'Page Unresponsive' error in Chrome.
Environment:
- Power Automate Web (make.powerautomate.com)
- Browser: Google Chrome (latest)
- Organization: Microsoft 365 Enterprise
- Region: Korea
Steps to Reproduce:
1. Open Power Automate and navigate to My Flows
2. Select any flow that contains an AI Builder 'Run a prompt' action
3. Click Edit
4. New Designer loads but immediately freezes — browser shows 'Page Unresponsive' dialog
Expected Behavior:
The flow editor should open and allow editing as normal.
Actual Behavior:
- New Designer freezes immediately on load
- Chrome displays 'Page Unresponsive' popup
- The flow itself runs perfectly fine — only the editor is affected
- Switching to the Old Designer resolves the issue completely
Additional Notes:
- This issue started occurring a few days ago. It was working fine before without any changes on my end.
- Only affects flows containing AI Builder 'Run a prompt' (GPT Prompt) actions
- Flows without AI Builder actions open and edit normally in New Designer
- Verified Asynchronous Pattern is ON in action settings
- Tried clearing Chrome cache, disabling extensions, and removing ?v3=true from URL — none resolved the issue
- Old Designer works fine as a workaround
This appears to be a regression introduced by a recent server-side update to the New Designer.
Has anyone else experienced this recently? Any workaround or ETA for a fix would be greatly appreciated.
Thank you.
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