.m.rule.contains_display_name overrides "all messages" notification option for room

[timofej673]

Description

Notifications are not received when sending a message mentioning a user when mentioning the user is disabled, even if the notification settings are marked as all messages.

That is, if I have:
GET _matrix/client/v3/pushrules/global/override/.m.rule.contains_display_name:
{"conditions":[{"kind":"contains_display_name"}],"actions":[],"rule_id":".m.rule.contains_display_name","default":true,"enabled":true}

Then notifications are not sent even if the room is enabled in "all messages" mode:
GET /_matrix/client/v3/pushrules/global/room/<redacted>:
{"actions":["notify",{"set_tweak":"sound","value":"default"}],"rule_id":"<redacted>","default":false,"enabled":true}

I expected that when disabling notifications when mentioning the display name, notifications in the room should still come with notification (tweak) according to the settings in the room

I think this bug is related to synapse, since the rules are checked at its level, and it also regulates sending notifications to the push gateway or something like that.

Steps to reproduce

Follow these steps in Cinny:

• Create an account named, for example, andrew
• Create a room and enable all notifications in it (set the room to Notifications->All Messages)
• In Settings, under Notifications, under Special Messages, disable the "Contains Displayname" option (As far as I understand, this affects the push rules. m.rule.contains_display_name - it removes all actions, but even using "enabled: false" instead has the same effect)
• Send any message from another account that doesn't mention your display name
• Make sure notifications are working
• Send a message from another account that has a mention (this could even be a mention like andrew.test.net)
• The "All Messages" setting for the room is ignored and the notification doesn't arrive

Homeserver

Private homeserver

Synapse Version

1.143.0

Installation Method

Docker (matrixdotorg/synapse)

Database

PostgreSQL, single postgresql server, ported from sqlite. I once restored from a backup when the database was in SQLite format.

Workers

Single process

Platform

Arch Linux
Linux 6.16.8
Core i5-4200M
8GB ram
Run on real hardware, without virtualization

Configuration

No response

Relevant log output

With display name disabled:

synapse-1  | 2025-12-01 21:50:28,362 - synapse.access.http.8008 - 521 - INFO - PUT-3639 - 192.168.1.1 - 8008 - {<redacted>} Processed request: 0.048sec/0.001sec (0.008sec, 0.001sec) (0.003sec/0.007sec/10) 59B 200 "PUT /_matrix/client/r0/rooms/<redacted>/send/m.room.message/<redacted> HTTP/1.1" "Go-http-client/1.1" [0 dbevts]
synapse-1  | 2025-12-01 21:50:28,363 - synapse.federation.sender - 648 - INFO - process_event_queue_for_federation-324 - Unexpectedly did not have cached prev group for $NcuNsBYxTuNSyC6umSuVYYeGgZ7uM21H-PpQHtaKGEc





With display name enabled:

synapse-1  | 2025-12-01 21:51:50,961 - synapse.access.http.8008 - 521 - INFO - PUT-3689 - 192.168.1.1 - 8008 - {<redacted>} Processed request: 0.061sec/0.003sec (0.008sec, 0.000sec) (0.003sec/0.011sec/11) 59B 200 "PUT /_matrix/client/r0/rooms/<redacted>/send/m.room.message/<redacted> HTTP/1.1" "Go-http-client/1.1" [0 dbevts]
synapse-1  | 2025-12-01 21:51:50,971 - synapse.push.httppusher - 254 - INFO - httppush.process-110 - Processing 1 unprocessed push actions for <redacted> starting at stream_ordering 307340
synapse-1  | 2025-12-01 21:51:50,972 - synapse.push.httppusher - 254 - INFO - httppush.process-109 - Processing 1 unprocessed push actions for <redacted> starting at stream_ordering 307340
synapse-1  | 2025-12-01 21:51:50,974 - synapse.push.httppusher - 254 - INFO - httppush.process-111 - Processing 1 unprocessed push actions for <redacted> starting at stream_ordering 307340
synapse-1  | 2025-12-01 21:51:50,974 - synapse.push.httppusher - 254 - INFO - httppush.process-108 - Processing 1 unprocessed push actions for <redacted> starting at stream_ordering 307340
synapse-1  | 2025-12-01 21:51:51,449 - synapse.http.client - 454 - INFO - httppush.process-108 - Received response to POST https://<redacted>/_matrix/push/v1/notify: 200
synapse-1  | 2025-12-01 21:51:51,510 - synapse.http.client - 454 - INFO - httppush.process-109 - Received response to POST https://<redacted>/_matrix/push/v1/notify: 200
synapse-1  | 2025-12-01 21:51:51,514 - synapse.http.client - 454 - INFO - httppush.process-111 - Received response to POST https://push.fluffychat.im/_matrix/push/v1/notify: 200
synapse-1  | 2025-12-01 21:51:51,550 - synapse.http.client - 454 - INFO - httppush.process-110 - Received response to POST https://matrix.org/_matrix/push/v1/notify: 200

Anything else that would be useful to know?

No response

[devonh]

Using Element Web I am failing to reproduce this behaviour.
Using the steps you laid out I see the expected behaviour (globally disable notifications for mentions, set room to notify on all messages, receive notifications for all messages, including those with mentions)

I think this may be a Cinny bug.
Would you be able to try and reproduce using Element Web? (Or another client)