Retention deleted messages keep displaying

[xxfogs]

Steps to reproduce

Prerequisites

Retention config:

# retention, data control
retention:
    enabled: true
    default_policy:
        min_lifetime: 14d
        max_lifetime: 90d
    allowed_lifetime_min: 1d
    allowed_lifetime_max: 90d

media_retention:
    local_media_lifetime: 90d

delete_stale_devices_after: 30d

Steps

1. Open Element desktop app
   • Where the homeserver has message retention enabled
2. Go to a channel with messages older than the retention period
3. Notice how some messages remain even beyond (Oldest message 105 days ago) the retention period (90 + 1 days)

4. Open Element Android
5. Navigate to the same channel
6. Notice how all the messages beyond the retention period are gone (Oldest message 90 days ago)

Outcome

What did you expect?

I expected for all messages beyond the message retention period to be gone as it is on Element Android

What happened instead?

Some messages remain even beyond the retention period.
I presume this has something to do with the message cache (Security & Privacy > Encryption > Message search), however after resetting it, the messages still remained.

Operating system

Debian GNU/Linux 12

Application version

Element version: 1.11.89 Crypto version: Rust SDK 0.7.2 (2f872cf), Vodozemac 0.8.1

How did you install the app?

https://element.io/download APT repository

Homeserver

Synapse 1.121.1

Will you send logs?

No

[t3chguy]

The server does not notify the client when a message is removed due to retention, nor the retention period in place on that specific server, the server could/should send redactions to inform the client when events are removed otherwise the client has no way of knowing. I suggest raising an issue on the server or spec. Element Android likely just doesn't cache things, I know Element X doesn't cache things at all.