Quick diagnostics you can try

To help pin it down:

1. Check other apps
   • In Notepad and in your web browser, type in a text box and right‑click:
     • Does focus stay where it should?
     • → Then likely TheBrain‑specific.
     • Does focus jump?
     • → Likely OS, driver, or external utility.
2. Try a different mouse
   • If you have a second mouse or touchpad:
     • Use that to right‑click in TheBrain while typing.
     • If the issue goes away, it might be:
       • Mouse driver / custom button software
       • Some special “gesture” mapped to right‑click.
3. Turn off any “helper” utilities temporarily
   • Things that can react to right‑click:
     • Clipboard managers
     • Window manager tools
     • Custom context menu tools
   • If turning them off stops the issue, we’ve found the likely culprit.

If after this you see: “This only happens inside TheBrain, other editors are fine,” that’s strong evidence of a TheBrain 15 / Win 11 interaction bug—and I’d recommend reporting it directly to TheBrain support with:

• Exact TheBrain version/build number
• Windows 11 build
• Single vs multi‑monitor

Precise steps: “In note editor, type, then right‑click at X → focus jumps to Y”