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first-contribution

status: needs confirmation

Status: Open.

#31337 In matplotlib/matplotlib;

· zhangjy-ge opened on Mar 19, 2026

[Bug]: Changing the color of a contour plot messes up the contour lines and fill colors

status: confirmed bug

topic: contour

Status: Open.

#31335 In matplotlib/matplotlib;

· smith2936 opened on Mar 19, 2026

[Bug]: Crash when removing colorbar axes in a constrained layout

status: needs clarificationIssues that need more information to resolve.Issues that need more information to resolve.

Status: Open.

#31330 In matplotlib/matplotlib;

· williamlus opened on Mar 19, 2026

[ENH]: Support third-party layout engine string names

New feature

Status: Open.

#31328 In matplotlib/matplotlib;

· anntzer opened on Mar 18, 2026

[Bug]: Crash when removing a subfigure with a subplot in a figure

status: confirmed bug

Status: Open.

#31319 In matplotlib/matplotlib;

· williamlus opened on Mar 17, 2026

·  

v3.10.9

[ENH]: Use deterministic solver instead of constrained_layout?

topic: geometry managerLayoutEngine, Constrained layout, Tight layoutLayoutEngine, Constrained layout, Tight layout

Status: Open.

#31312 In matplotlib/matplotlib;

· jklymak opened on Mar 16, 2026

stairs with dashed linestyle and fill=True raises ValueError

topic: plotting methods

Status: Open.

#31302 In matplotlib/matplotlib;

· QuLogic opened on Mar 13, 2026

[Bug]: QtAgg backend does not preserve linestyles refined by dash tuples after editing parameters

backend: agg

GUI: Qt

Status: Open.

#31289 In matplotlib/matplotlib;

· smith2936 opened on Mar 12, 2026

[Bug]: Cannot change xlabel after drawing custom axes with xlabel

topic: mpl_toolkit

Status: Open.

#31288 In matplotlib/matplotlib;

· williamlus opened on Mar 12, 2026

[MNT]: Scale val_in_range method

Maintenance

Status: Open.

#31286 In matplotlib/matplotlib;

· scottshambaugh opened on Mar 11, 2026

[Bug]: 3D ax1's tick labels and ax2's title overlap in a constrained layout

topic: geometry managerLayoutEngine, Constrained layout, Tight layoutLayoutEngine, Constrained layout, Tight layout

topic: mplot3d

Status: Open.

#31277 In matplotlib/matplotlib;

· williamlus opened on Mar 11, 2026

[Bug]: Setting aspect back to auto cannot recover the original 3D plot

status: confirmed bug

topic: mplot3d

Status: Open.

#31276 In matplotlib/matplotlib;

· smith2936 opened on Mar 11, 2026