Stepping sometimes causes focus to pass to another thread

Open

#322,448 opened on Jun 22, 2026 3 comments 0 reactions 1 assignee View on GitHub

@connor4312 is already working on this.

Since Jun 22, 2026.

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This issue has not been assessed yet.

Description

bug debug

Type: Bug

When I step in a multi-target debugging scenario, the source code and call stack should remain focused on the debug session/thread that I am stepping in. I am noticing that sometimes that is true, and sometimes the focus swaps to another debug session/thread that is stopped.

For context, I am maintaining a custom debug adapter that performs remote debugging, so stepping can often take longer than 800ms. The behavior that I expect seems to conflict with the behavior that was introduced in these issues/commits and their followups:

In order to keep both of these behaviors, here are some ideas:

Create a user setting to choose whether focus should be automatically passed to another thread or not when the current one starts running
Create a user setting to adjust the timeout for the automatic focus passing
Add a new DAP property for StoppedEvent or use the existing "preserveFocusHint" to change focus back to the stopped thread if the focus has been passed away

Let me know if you want me to recreate this with the Mock Debug Adapter.

VS Code version: Code 1.123.0 (6a44c352bd24569c417e530095901b649960f9f8, 2026-06-03T11:29:03+02:00)
OS version: Linux x64 7.0.11-arch1-1
Modes:

System Info

Item	Value
CPUs	AMD Ryzen 7 5800X 8-Core Processor (16 x 4541)
GPU Status	2d_canvas: enabled GPU0: VENDOR= 0x10de [Google Inc. (Mesa)], DEVICE=0x1cb6 [ANGLE (Mesa, NV137, OpenGL ES 3.2 Mesa 26.1.2-arch1.1)], DRIVER_VENDOR=Mesa, DRIVER_VERSION=26.1.2 ACTIVE Machine model name: Machine model version: direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off trees_in_viz: disabled_off video_decode: enabled video_encode: disabled_software vulkan: disabled_off webgl: enabled webgpu: enabled webgpu_on_vk_via_gl_interop: disabled_off webnn: disabled_off
Load (avg)	6, 7, 7
Memory (System)	62.70GB (36.85GB free)
Process Argv	--crash-reporter-id 7d5ad6ef-34f6-4670-aa76-057c6dedc880
Screen Reader	no
VM	0%
DESKTOP_SESSION	hyprland
XDG_CURRENT_DESKTOP	Hyprland
XDG_SESSION_DESKTOP	hyprland
XDG_SESSION_TYPE	wayland

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chat:31457767
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89g7j272:31518289
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ghj88844:31499326
ec1eg703:31520046
ddid_t:31478206
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7df3h592:31512476
cp_cls_t_1082:31535311
logging_enabled_new:31498466
db5d2638:31499441
jb_cp_cls_t_632:31537244
b1ei0813:31506238
56dj4588:31512888
32d76977:31512328
ha629193:31508444
cdk-lw-on:31524445
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cp_intellij_t_nes:31533504
d7b18187:31526828
h561g132:31533256
ihg5j128:31534457

Dominant language: TypeScript
Stars: 193k
Forks: 42.9k
PR merge metrics: PR metrics pending

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