Hi, these are teh recommended troubleshooting steps we have:

Troubleshooting & Immediate Workarounds

1. Browser Recommendations:

   • Use an incognito/private window to avoid interference from browser extensions/ad blockers.
   • Monitor memory consumption; close other tabs and apps if running out of RAM.

2. Disable Enhanced Notebook Tabs:

   • Switch to the legacy notebook UI instead of the enhanced tabs. Go to “Settings → Developer → Tabs for notebooks and files.” This allows you to open each notebook in separate browser tabs (similar to Google Colab), reducing strain from tab switching.

3. Collect Browser Performance Data:

   • Capture a browser “performance trace” while reproducing the lag. Use developer tools (Chrome DevTools Performance tab).
   • Install third-party tools like Lag Radar to visualize client-side delay.

4. Workspace Hardware:

   • If possible, confirm hardware specifications and consider upgrading RAM/CPU if routinely working with large notebooks.

5. VDI Environment Specifics:

   • Slowdowns are frequently worse on VDIs. If possible, test locally or compare with cloud-based resources.

But really I'd recommend filing a support ticket.