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Assigning a DataFrame column with dd.to_datetime() changes dtypes of unrelated columns

needs triageNeeds a response from a contributor

Status: Open.

#12556 In dask/dask;

· andrewrli opened

on Aug 15, 2026

Dask optimization of [merge_asof + drop] graphs removes columns prematurely

needs triageNeeds a response from a contributor

Status: Open.

#12544 In dask/dask;

· albarji opened

on Aug 7, 2026

Unable to save dask dataframe containing list column with pandas==3

needs triageNeeds a response from a contributor

Status: Open.

#12543 In dask/dask;

· joshua-gould opened

on Aug 6, 2026

Autochunking fails with zero length dimensions

needs triageNeeds a response from a contributor

Status: Open.

#12537 In dask/dask;

· charles-turner-1 opened

on Aug 1, 2026

Implicit re-exports in __init__.py

needs triageNeeds a response from a contributor

Status: Open.

#12526 In dask/dask;

· JeppeKlitgaard opened

on Jul 28, 2026

dask.visualize shows unfused graphs, but scheduler runs fused graph

needs triageNeeds a response from a contributor

Status: Open.

#12517 In dask/dask;

· maneesh29s opened

on Jul 22, 2026

dask-expr bug: dd.drop([], axis=1) raises ValueError

needs triageNeeds a response from a contributor

Status: Open.

#12510 In dask/dask;

· jtilly opened

on Jul 20, 2026

Optimized graph size depends on PYTHONHASHSEED (up to 30x task-count blowup)

needs attentionIt's been a while since this was pushed on. Needs attention from the owner or a maintainer.

needs triageNeeds a response from a contributor

Status: Open.

#12507 In dask/dask;

· bertcoerver opened

on Jul 16, 2026

persist() on a root read_parquet with column projection returns a corrupt collection; any later compute fails with "lost dependencies"

needs attentionIt's been a while since this was pushed on. Needs attention from the owner or a maintainer.

needs triageNeeds a response from a contributor

Status: Open.

#12488 In dask/dask;

· Dimitri-Schnider opened

on Jul 4, 2026

Dask to_zarr warns and rechunks on existing array template

needs triageNeeds a response from a contributor

Status: Open.

#12458 In dask/dask;

· Jaapel opened

on Jun 12, 2026

clone() corrupts graphs containing Task/GraphNode values, breaking task-spec fusion

needs triageNeeds a response from a contributor

Status: Open.

#12455 In dask/dask;

· JSKenyon opened

on Jun 11, 2026

Severe repartition slowdown for wide PyArrow-string DataFrames with unknown divisions

needs triageNeeds a response from a contributor

Status: Open.

#12449 In dask/dask;

· albarji opened

on Jun 8, 2026