[UI] Datepicker goes crazy if there is validation error

[matthieuauger]

Apache Airflow version

3.1.1

If "Other Airflow 2/3 version" selected, which one?

No response

What happened?

Hi,

When using the datepicker from the backfill popin.

If I put some dates that trigger validation error (for example put an end date before the start date), the datepicker goes crazy when I try to change numbers, even if I select the day, all others fields can change randomly.

I added a video to show what happens.

Screen.Recording.2025-10-30.at.11.35.46.mov

What you think should happen instead?

No response

How to reproduce

• See video and description

Operating System

macos

Versions of Apache Airflow Providers

No response

Deployment

Other Docker-based deployment

Deployment details

No response

Anything else?

No response

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

[jgoedeke]

This behavior looks familiar with what I described here: #54006 (comment)

[Tomi-1997]

Currently checking this out. I don't think it is related to verification.
Try to modify the year when only the start date is full, does it still happen?

[matthieuauger]

Yes I noticed I have this issue on other situations than validation so it may be larger