Logbook not showing end date (Firefox)

[ZTHawk]

Checklist

• I have updated to the latest available Home Assistant version.
• I have cleared the cache of my browser.
• I have tried a different browser to see if it is related to my browser.
• I have tried reproducing the issue in safe mode to rule out problems with unsupported custom resources.

Describe the issue you are experiencing

Since 2025.1 the logbook does not show the end date anymore.
2024.12 was working fine.

I am using Firefox 134.0. I have cleared the cache already.
Android app is working fine.
Chrome is working fine too.

Describe the behavior you expected

See start and end date

Steps to reproduce the issue

Use Firefox 134 and open logbook

What version of Home Assistant Core has the issue?

2025.1

What was the last working version of Home Assistant Core?

2024.12

In which browser are you experiencing the issue?

Firefox 134

Which operating system are you using to run this browser?

Windows 10

State of relevant entities

No response

Problem-relevant frontend configuration

No response

Javascript errors shown in your browser console/inspector

No response

Additional information

No response