ContactPoint2D.normalImpulse returns a high value when touching the wall with the object at rest, and Multithreading enabled for Physics2D

Reproduction steps:
1. Open the attached project "ReproProj"
2. Open the “/Assets/Scenes/Test.unity” Scene
3. Enter the Play Mode
4. Move the character towards the drop
5. Let the player fall and collide with the wall, so it becomes pressed against it
6. Observe the Console

Expected result: Single “EXTREME CONTACT: Contact 1 - “ Warning is present
Actual result: Multiple “EXTREME CONTACT: Contact 1 - “ Warnings exist showing high value when the object is at rest

Reproducible with: 6000.1.13f1, 6000.2.0b12, 6000.3.0a3
Could not test with: 2022.3.65f1, 6000.0.54f1 (Library\PackageCache\com.unity.2d.common@10.0.0\Runtime\InternalBridge\InternalEngineBridge.cs(21,28): error CS1061: 'SpriteRenderer' does not contain a definition for 'SetBoneTransforms' and no accessible extension method 'SetBoneTransforms' accepting a first argument of type 'SpriteRenderer' could be found)

Reproducible on:
Play Mode
Windows Standalone Player

Testing environment: Windows 10 Enterprise 21H2
Not reproducible on: No other environment tested

Note:

• Disabling the magnet force in the Player component (which applies a sticking force to walls) does not affect the outcome; the issue still occurs, confirming that it’s unrelated to custom forces.

Workaround:
1. Go to Project Settings > Physics 2D > Multithreading
2. Disable “Use Multithreading”