bug: New Version Animation Lag

[mobin85]

Duplicate Check

• I have searched the opened issues and there are no duplicates

Describe the bug

In this video you can see a lag issue when resizing the window in Flet 0.80.0.

What’s important is that I tested the same project before on Flet 0.25.2, and there was no lag at all during window resize. After upgrading to version 0.80.0, this issue started happening.

It seems related to internal changes in the newer versions.
If anyone has experienced the same issue or knows a workaround or fix, I’d really appreciate your help 🙏

It seems like almost all animations and effects in the new version are somewhat laggy.
If anyone else is experiencing this as well, please let me know.

2025-12-25.21-12-58.mp4

Code sample

Code

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To reproduce

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Expected behavior

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Screenshots / Videos

Captures

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Operating System

Windows

Operating system details

Windows 11

Flet version

0.80.0

Regression

Yes, it used to work in a previous Flet version (please specify the version in additional details)

Suggestions

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Logs

Logs

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Additional details

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[felipinas99]

Got a solution ?

[mobin85]

nope

[FeodorFitsner]

"Me too" guys - can you be more specific please? A repro code demonstrating the issue would be helpful.