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

Texture Import Warnings are obscured by other Terrain Layer options in the Inspector
Burst Inspector middle divider is jittering when resized with the Burst Inspector window docked
JsonConvert conversion fails trying to call GetCallbackMethodsForType when [OnDeserialized] is used in a class
Different text alignment in the column header in Entities "System" window
Objects with Universal Render Pipeline/Particles/Lit shader are always lit up when changing their Rendering Layer Mask

See all new issues