On Wayland, trying to use a main menu accelerator always opens the "File" menu

[guss77]

Describe the bug
When running Eclipse on Linux under a the kwin Wayland compositor, trying to access the main menu entry using the the entry's menu accelerator (ALT+letter) always opens the "File" menu, but doesn't pre-select any entry. Pressing the letter again opens the correct menu.

To Reproduce
Steps to reproduce the behavior:

1. Open Eclipse under KDE Plasma 6 on Wayland
2. Press (for example) ALT+A to access the "Search" menu

Expected behavior
The "Search" menu should be opened with the first item selected. Instead, the "File" menu is opened, with no item pre-selected.

Environment:

1. Select the platform(s) on which the behavior is seen:

• • All OS
• • Windows
• • Linux
• • macOS

2. Additional OS info (e.g. OS version, Linux Desktop, etc)

Operating System: KDE neon User Edition
KDE Plasma Version: 6.5.4
KDE Frameworks Version: 6.22.0
Qt Version: 6.10.1
Kernel Version: 6.14.8-061408-generic (64-bit)
Graphics Platform: Wayland
Processors: 20 × 12th Gen Intel® Core™ i7-12700H
Memory: 32 GiB of RAM (31.0 GiB usable)
Graphics Processor: Intel® Iris® Xe Graphics

3. JRE/JDK version

openjdk 21.0.9 2025-10-21
OpenJDK Runtime Environment (build 21.0.9+10-Ubuntu-124.04)
OpenJDK 64-Bit Server VM (build 21.0.9+10-Ubuntu-124.04, mixed mode, sharing)

Workaround (or) Additional context

I could not reproduce this problem under mutter (GNOME).

I could not reproduce this problem with the SWT_GTK4=1 environment flag, though there were a lot of other problem and the GTK4 implementation is quite unusable.

I could not reproduce the problem under XWayland (setting GDK_BACKEND=x11 environment variable) - as mentioned in issue #938 .