Date separators sometimes show up multiple times per day

[CrazyNicc]

Issue Description

Sometimes, the Timeline Separator for different dates gets shown multiple times per day. See the screenshot below

Expected Behavior

Showing these subsequent messages as one timeline, without Date Separators

Actual Behavior

Cinny shows multiple Date Separators for subsequent messages

Reproduction Steps

None known yet. The events all look normal

The image above was taken in the Spec Room

Environment

- OS: Linux
- Browser: Chromium
- Cinny Web Version: 4.12.6, app.cinny.in
- Matrix Homeserver: selfhosted Synapse

Relevant Logs

No response

Additional context

No response

I acknowledge that:

• I have searched the Cinny repository (both open and closed Discussions and Issues) and confirm this is not a duplicate of an existing issue or discussion.
• I have checked the "Preview" tab on all text fields to ensure that everything looks right, and have wrapped all configuration and code in code blocks with a group of three backticks (```) on separate lines.

[kfiven]

#3071