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[BUG] 4.2.0: callback-rendered children unmount/remount instead of updating in place (regression, bisects to #3570)

Status: Open.

#3846 In plotly/dash;

· romanov-o opened on Jun 25, 2026

[Feature Request] Re-introduce pre-v4 Dropdown as "legacy" option

Status: Open.

#3844 In plotly/dash;

· DrGFreeman opened on Jun 24, 2026

[Feature Request] Drop mcp dependency in Dash 4.3.0 to avoid excess dependencies

Status: Open.

#3835 In plotly/dash;

· ghaarsma opened on Jun 20, 2026

[BUG]: Fastapi page routes trigger 500 internal server error

Status: Open.

#3834 In plotly/dash;

· joschrag opened on Jun 19, 2026

[BUG] Jupyter jupyter_dash.infer_jupyter_proxy_config() doesn't work with ipykernel>=7

Status: Open.

#3833 In plotly/dash;

· AlexCK-STFC opened on Jun 19, 2026

[BUG] @plotly/dash-jupyterlab extension failed to build in JupyterLab running on a JupyterHub server

Status: Open.

#3828 In plotly/dash;

· tlvu opened on Jun 18, 2026

[BUG] Dash with CSRFProtect from Flask-WTF no longer working after Dash 4.1 to 4.2 upgrade

Status: Open.

#3827 In plotly/dash;

· ghaarsma opened on Jun 17, 2026

WebSocket callback concurrency is bounded by an unconfigurable thread pool

dash-callbacksrelated to callbacksrelated to callbacks

performancesomething is slowsomething is slow

Status: Open.

#3825 In plotly/dash;

· ndrezn opened on Jun 17, 2026

[BUG] dash.testing ThreadedRunner.stop() hangs at teardown for Quart backend apps

Status: Open.

#3823 In plotly/dash;

· joschrag opened on Jun 17, 2026

[Feature Request] Avoid rendering dcc.Graph unless visible in the DOM

Status: Open.

#3820 In plotly/dash;

· ndrezn opened on Jun 16, 2026

[BUG] Callbacks double-registered when using uvicorn --reload under backend="fastapi"

Status: Open.

#3818 In plotly/dash;

· essol-li opened on Jun 15, 2026

[BUG] WebSocket callbacks do not expose request cookies/headers on callback_context

Status: Open.

#3814 In plotly/dash;

· i-murray opened on Jun 12, 2026