Disappearing messages: setting them above 4 weeks create inconsistent behavior

[ggrelet]

• I have searched open and closed issues for duplicates
• I am submitting a bug report for existing functionality that does not work as intended
• This isn't a feature request or a discussion topic

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Bug description

Disappearing messages: I understand that it's not possible to set the disappearing message to a value above 4 weeks (official doc source).
On the custom parameter view, turning the number wheel of that parameter to a value above 4 and then the unit wheel to weeks always makes the number wheel back to 4.
However, I noticed that putting the value at 15 and the unit wheel on weeks and then going back to the conversation view, we are told that disappearing messages will last 15 weeks.

Steps to reproduce

• Go on the disappearing messages setting panel
• Click on "custom value"
• Put the number wheel on 15 (arbitrary, above 4)
• Put the unit values to weeks

Actual result:
The number is pushed back to 4 by the app.
But when back to the conversation, a small message says that disappearing messages will last 15 weeks.
Not sure which is the actual truth but the message is different from the setting.

Expected result:
Disappearing messages should last 4 weeks, as per the official documentation.

Screenshots

In French

ScreenRecording_01-26-2025.15-58-40_1.MP4

Device info

Device: iPhone 13 Mini

iOS version: 18.2.1

Signal version: 7.4.3 (573)

Link to debug log

https://debuglogs.org/ios/7.43.0/56d00ff58e5f1df9cbe6bbdedddac8348e1adfc71ea951db8be08951235b4aff.zip

[MarlowBrown]

Hey there!

I'm a contributor to the repository! Thank you for reporting the bug! I made a quick fix for it!

Simulator.Screen.Recording.-.iPhone.16.-.2025-02-08.at.22.25.04.mp4

Here is the PR!