Pinned chats re-order themselves

[rut8634]

Guidelines

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

Bug description

Pinned chats no longer consistently stay in the order the user pinned them.

Screenshots

n/a

Device

Google Pixel (>5, cannot specify exact model for privacy)

Android version

15

Signal version

7.38.6

Link to debug log

Cannot submit for privacy reasons.