Steals system focus

[nadia-tarashkevich]

Steps to reproduce
Run an application in debug mode using IntelliJ IDEA with JRebel.
Make a change in the code that triggers compilation.
Switch focus to another application (e.g., a web browser) and start typing in a text field.
Expected result
IntelliJ IDEA compiles in the background without interrupting the user's workflow in the other application.

Actual result
While IntelliJ IDEA compiles, it forces the application window to become the focused window, interrupting the user's workflow and potentially causing unintended edits or interactions.

Environment
Operating System: Windows 11
IDE version: IntelliJ IDEA 2025.1.3 (Ultimate Edition), Build #IU-251.26927.53, built on June 23, 2025

Originally reported at https://youtrack.jetbrains.com/issue/IJPL-196460

[Artur-]

Tried to reproduce with IntelliJ 2025.2 Ultimate with Vaadin plugin 1.5.3 as

1. New -> Project -> Vaadin -> Create
2. Launching the Application class as "Rebel Debug"
3. Waiting for the login screen to open in a browser
4. Modify the text in the login view Java file (DevLoginView.java)

Actual result
IntelliJ compiles, the UI in the browser is redrawn with the changes. IntelliJ is never focused.

[nadia-tarashkevich]

I have no further steps to reproduce this issue. My recommendation was to disable Vaadin plugin, it resolved the issue for the user.