Unity Issue Tracker - Several project templates have the 2D physics option Reuse Collision Callbacks disabled but it should be the default of enabled.

Unity Account

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account

Language

Chinese
Spanish
Japanese
Korean
Portuguese

Search Issue Tracker

Fixed in 6000.0.65f1

Fixed in 6000.0.X, 6000.3.X, 6000.4.X, 6000.5.X, 6000.5.0a4

Votes

1

Found in

6000.0.0b11

6000.3.0a1

6000.4.0a1

6000.5.0a1

Issue ID

UUM-129517

Regression

No

Several project templates have the 2D physics option Reuse Collision Callbacks disabled but it should be the default of enabled.

Dec 05, 2025

Reported here:

[https://discussions.unity.com/t/reuse-collision-callbacks-in-2d-physics-settings-is-off-by-default-in-unity-6/1611353]

With this setting off, physics callbacks will produce garbage.

Add comment

All about bugs

View bugs we have successfully reproduced, and vote for the bugs you want to see fixed most urgently.

Latest issues

Project Auditor Analysis is not marked dirty when the save file is deleted even after reopening the Project Auditor window
“Shader Graphs” text in the blackboard is hard to see
"NullReferenceException" error is thrown when changing input field focus via script with custom validation
The Tables in the Project Auditor’s Assemblies, and Precompiled Assemblies tabs does not scale with the Project Auditor window size which leads to unused empty space and bigger scrollbars in the tables
Tile Palette button with longer Palette name is misaligned and cut-off when Tile Palette Clipboard overlay is resized

See all new issues