Undo/Redo breaks in Params and URL fields after switching tabs

[aditya-bruno]

I have checked the following:

• I have searched existing issues and found nothing related to my issue.

This bug is:

• Making Bruno unusable for me.
• Slowing me down but I'm able to continue working.
• Annoying.
• This feature was working in a previous version but is broken in the current release.

Bruno version

4.1.0

💻 Operating System

macOS

Specific OS Version / Distro

Others

🐞 Describe the bug

Undo/Redo (Cmd+Z / Cmd+Y on Mac) doesn't work like a normal editor undo in a couple of fields.

Query param Name field: undo works fine word by word as long as you stay on the same tab. But once you switch to another tab and come back, Cmd+Z stops doing anything at all.

Query param Value field and the URL bar: same tab switching trigger, but instead of doing nothing, Cmd+Z wipes the whole field content in one shot instead of undoing it gradually.

The request body editor also shows some undo/redo issues, but the behavior there was inconsistent across tests, so keeping this report focused on the Name and Value/URL cases above, which reproduce reliably.

📝 Steps to reproduce

Case 1, Params Name field:

1. Open a request, go to Params tab, type a name in the Query Name field.
2. Press Cmd+Z without switching tabs. It undoes normally, word by word.
3. Type the name again, switch to another request tab, then switch back.
4. Press Cmd+Z. Nothing happens, the field does not undo.

Case 2, Params Value field and URL bar:

1. Type something in a query param's Value field, or directly in the URL bar.
2. Switch to another tab, then switch back.
3. Press Cmd+Z. The entire field content disappears in one shot instead of undoing gradually.

Case 3, Request body:

1. Open a request, go to Body, type something in the editor.
2. Press Cmd+Z without switching tabs at all. The entire body disappears in one shot, not word by word.
3. Press Cmd+Y. The entire body comes back in one shot.

📁 Collection to reproduce

No special collection needed, any collection with at least two requests works so you have a second tab to switch to.

📷 Screenshots/Live demo link

Video attached below showing all three cases.

Screen.Recording.2026-08-28.at.8.54.51.PM.mov

[tech-dipesh]

Yes, it appears to be the same for my system also. I would love to work on this issue if it assign to me, as it just releases a focus motion as soon as we change a tab.

[anusree-bruno]

@tech-dipesh Sure, you can raise a PR.

[tech-dipesh]

Before writing code, I want to know how Bruno is storing or preserving a undo/redo history. Does it store on the centralized state management or within in memory? In what way does it store a undo/redo history..