Weird Softbody behaviour with Area3D wind when physics interpolation is off

[Peelep]

Tested versions

• Reproducible in 4.5-beta1
• Not reproducible in 4.4.1-stable
• If I bisected correctly, the bug was introduced in FTI - Reduce VisualInstance3D xform notifications (reverted) #105901

System information

Windows 11 (build 26100) - Multi-window, 2 monitors - Vulkan (Forward+) - dedicated Radeon RX 580 Series (Advanced Micro Devices, Inc.; 31.0.21921.1000) - AMD Ryzen 9 5900X 12-Core Processor (24 threads)

Issue description

Found this while testing #105759
The mrp in that issue has Softbody3D interacting with Area3D wind (godotphysics).
Turning physics interpolation on fixes the issue.

Screenshots taken after letting the project run a few seconds.

4.5-beta1	4.4.1-stable

Steps to reproduce

Run the MRP and wait a few seconds to see weird behaviour, then run it again with physics interpolation on and see it work properly.

Minimal reproduction project (MRP)

softbody-mrp.zip

[lawnjelly]

Can investigate when home on Sunday, or anyone else welcome, is likely to be a simple logic bug.

[simpkins]

I believe #107830 fixes this.

[Peelep]

I can confirm that #107830 fixes this.