Skip to content

bug: New Version Animation Lag #5942

@mobin85

Description

@mobin85

Duplicate Check

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
[Paste your code here]

To reproduce

...

Expected behavior

No response

Screenshots / Videos

Captures

[Upload media here]

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

No response

Logs

Logs
[Paste your logs here]

Additional details

No response

Metadata

Metadata

Assignees

No one assigned

    Labels

    bugSomething isn't working

    Type

    No type
    No fields configured for issues without a type.

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions