Day of month is missing from date header in message list when month matches current month

[wezm]

Here's a screenshot of community.mattermost.com taken on a Google Pixel 9a phone running Android 16, and the Mattermost app from Google Play, version 2.36.1:

Note that all the messages from different days in January 2026 are missing the day of the month, there's just a blank area where it should be.