Second instance of JetBrains IDE opens without a title bar (cannot move/close via UI)

[vitorafgomes]

Description

When launching two instances of JetBrains IDEs (Rider, IntelliJ IDEA, etc.) on Pop!_OS COSMIC (Wayland), only the first window shows a title bar.
The second window is created without a title bar/controls.

Observed since COSMIC Alpha and still present in COSMIC Beta LTS.

A screenshot is attached showing the window without the header.

Steps to Reproduce

1. Open a JetBrains IDE (e.g., Rider).

2. Open a second project in a new window (File ▸ New Window) or start the IDE again.

3. Compare:

   • Window 1 → has title bar and window controls.
   • Window 2 → no title bar/controls (no area to drag; no close/maximize buttons).

Expected Behavior

All windows should open with a title bar/header.

Actual Behavior

The second window opens without a title bar.

Reproducibility

Always (100%).

Affected Applications

• JetBrains Rider
• JetBrains IntelliJ IDEA
• (likely others using the same JetBrains runtime)

Environment

• Edition: Pop!_OS COSMIC Beta LTS (occurs since Alpha)
• Session: Wayland
• JetBrains install method: [fill: Toolbox / tar.gz / Flatpak]
• IDE versions: [fill, e.g., 2024.x + JBR]

Hardware (from attached system info)

• Model: System76 Serval WS
• CPU: AMD Ryzen 9 3900 × 24
• Memory: 64.0 GiB
• Storage: 2.0 TB

Notes

• Happens regardless of how the second window is opened (launcher, terminal, or New Window).
• Tested with COSMIC tiling enabled and disabled — issue persists.
• Likely related to window decorations (CSD/SSD) when creating the second surface.