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[charts] SparkLineChart never disables its axis listener with default props

scope: chartsChanges related to the charts.Changes related to the charts.

status: waiting for maintainerThese issues haven't been looked at yet by a maintainer.These issues haven't been looked at yet by a maintainer.

Status: Open.

#23671 In mui/mui-x;

· bernardobelchior opened on Sep 21, 2026

[tree view] SimpleTreeView sets aria-checked on single-select trees and never sets aria-selected

scope: tree viewChanges related to the tree view. This includes TreeView, TreeItem.Changes related to the tree view. This includes TreeView, TreeItem.

status: waiting for maintainerThese issues haven't been looked at yet by a maintainer.These issues haven't been looked at yet by a maintainer.

Status: Open.

#23667 In mui/mui-x;

· wt-alejandroMendoza opened on Sep 21, 2026

[scheduler] Make every user-facing store error translatable through localeText

l10nLocalization.Localization.

on holdThere is a blocker, we need to wait.There is a blocker, we need to wait.

scope: schedulerChanges related to the scheduler.Changes related to the scheduler.

type: enhancementIt’s an improvement, but we can’t make up our mind whether it's a bug fix or a new feature.It’s an improvement, but we can’t make up our mind whether it's a bug fix or a new feature.

Status: Open.

#23665 In mui/mui-x;

· rita-codes opened on Sep 21, 2026

[data grid] Aggregation cannot be cleared from the column menu: published v9 build never removes the column from the aggregation model

feature: AggregationRelated to the data grid Aggregation featureRelated to the data grid Aggregation feature

scope: data gridChanges related to the data grid.Changes related to the data grid.

support: premium standardSupport request from a Premium standard plan user. https://mui.com/legal/technical-support-sla.Support request from a Premium standard plan user. https://mui.com/legal/technical-support-sla.

type: bugIt doesn't behave as expected.It doesn't behave as expected.

Status: Open.

#23639 In mui/mui-x;

· mike-paretos opened on Sep 18, 2026

Sever side tree data, child rows order issue

feature: Server integrationBetter integration with backends, e.g. data sourceBetter integration with backends, e.g. data source

scope: data gridChanges related to the data grid.Changes related to the data grid.

support: premium standardSupport request from a Premium standard plan user. https://mui.com/legal/technical-support-sla.Support request from a Premium standard plan user. https://mui.com/legal/technical-support-sla.

type: bugIt doesn't behave as expected.It doesn't behave as expected.

Status: Open.

#23635 In mui/mui-x;

· shaominFei opened on Sep 17, 2026

[Chat] Support localeText on ChatProvider for headless/composable usage

scope: chatChanges related to the AI chat.Changes related to the AI chat.

type: enhancementIt’s an improvement, but we can’t make up our mind whether it's a bug fix or a new feature.It’s an improvement, but we can’t make up our mind whether it's a bug fix or a new feature.

Status: Open.

#23632 In mui/mui-x;

· flo-cursor opened on Sep 17, 2026

[chat] No way to tell "history not loaded yet" from "conversation is empty" — ChatBox flashes its empty state before listMessages resolves

scope: chatChanges related to the AI chat.Changes related to the AI chat.

type: bugIt doesn't behave as expected.It doesn't behave as expected.

Status: Open.

#23600 In mui/mui-x;

· vitch opened on Sep 15, 2026

[data grid] PremiumReorder widget - reordering an item to the bottom is suboptimal

scope: data gridChanges related to the data grid.Changes related to the data grid.

support: premium standardSupport request from a Premium standard plan user. https://mui.com/legal/technical-support-sla.Support request from a Premium standard plan user. https://mui.com/legal/technical-support-sla.

Status: Open.

#23596 In mui/mui-x;

· JBuhay34 opened on Sep 14, 2026

[scheduler] Monthly recurrence locale fns receive an English token (aria) or a pre-formatted name (label), no stable weekday token

l10nLocalization.Localization.

scope: schedulerChanges related to the scheduler.Changes related to the scheduler.

Status: Open.

#23595 In mui/mui-x;

· rita-codes opened on Sep 14, 2026

[scheduler] Agenda view crashes on an empty forward horizon (showEmptyDaysInAgenda: false) — days[0].value of undefined

scope: schedulerChanges related to the scheduler.Changes related to the scheduler.

type: bugIt doesn't behave as expected.It doesn't behave as expected.

Status: Open.

#23565 In mui/mui-x;

· pfreude opened on Sep 9, 2026

CI flakiness watch

ci-flake-watch

Status: Open.

#23561 In mui/mui-x;

· github-actions opened on Sep 9, 2026

[scheduler] Allow disabling event deletion with eventDeletion={false}

scope: schedulerChanges related to the scheduler.Changes related to the scheduler.

type: new featureExpand the scope of the product to solve a new problem.Expand the scope of the product to solve a new problem.

Status: Open.

#23559 In mui/mui-x;

· rita-codes opened on Sep 9, 2026