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<code>/keys/query</code> returning outdated device list for remote user

A-E2EE

Status: Open.

#18550 In element-hq/synapse;

· richvdh opened on Jun 13, 2025

Reject attempts to change the device keys of an existing device

A-E2EE

A-Performance

good first issueThis is a fix that might be an easy place for someone to start for their first contributionThis is a fix that might be an easy place for someone to start for their first contribution

O-Occasional

T-Enhancement

Status: Open.

#18511 In element-hq/synapse;

· richvdh opened on Jun 4, 2025

To-device message delivery delayed by queue of device_lists replication updates

A-E2EE

O-Occasional

S-Major

T-Task

Status: Open.

#18412 In element-hq/synapse;

· richvdh opened on May 8, 2025

/sync returns outdated OTK counts

A-E2EE

A-Sync

O-Frequent

S-Minor

T-Defect

Status: Open.

#17491 In element-hq/synapse;

· richvdh opened on Jul 26, 2024

Synapse omits <code>unsigned.membership</code> property on events served as part of a relationship aggregation

A-E2EE

A-Spec-Compliance

A-User-Experience

T-Enhancement

Status: Open.

#17487 In element-hq/synapse;

· richvdh opened on Jul 25, 2024

<code>/event</code> omits <code>unsigned.membership</code> property

A-E2EE

A-Spec-Compliance

A-User-Experience

T-Enhancement

Status: Open.

#17486 In element-hq/synapse;

· richvdh opened on Jul 25, 2024

<code>notifier.wait_for_events(user_id)</code> should notify when <code>device_one_time_keys_count</code> changes

A-E2EE

A-Sync

O-Occasional

S-Major

T-Defect

Status: Open.

#17474 In element-hq/synapse;

· MadLittleMods opened on Jul 23, 2024

Add a config option to block local users from enabling encryption in a room

A-Config

A-E2EE

T-Enhancement

Status: Open.

#17307 In element-hq/synapse;

· Twi1ightSparkle opened on Jun 14, 2024

A long queue of to-device messages can prevent outgoing federation working

A-E2EE

A-Federation

O-Frequent

S-Critical

T-Defect

Status: Open.

#17035 In element-hq/synapse;

· shyrwall opened on Mar 27, 2024

MSC3967 is not idempotent

A-E2EE

T-Task

Z-Help-Wanted

Z-Unimplemented-MSCs

Status: Open.

#16914 In element-hq/synapse;

· kegsay opened on Feb 13, 2024

<code>/keys/claim</code> is surprisingly slow

A-E2EE

A-Performance

O-Frequent

S-Minor

T-Defect

Status: Open.

#16554 In element-hq/synapse;

· matrixbot opened on Dec 21, 2023

Database stores multiple cross-signing keys of the same type for a given user

A-E2EE

O-Occasional

S-Tolerable

T-Defect

Status: Open.

#16398 In element-hq/synapse;

· matrixbot opened on Dec 21, 2023