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Maniphest T91560

Strange behaviour of Rigidbody physics on all versions [video + .blend file included]
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Description

System Information
Operating system: Linux Mint 19.1
Graphics card: Nvidia GTX 980

Blender Version
Broken:
blender-2.93.4 stable
blender-3.0.0-alpha+master.42546db49089-linux.x86_64-release (2 september)
blender-3.0.0-alpha+master.b5a1c194c5dd-linux.x86_64-release (13 september)
blender-3.0.0-alpha+master.276eebb27474-linux.x86_64-release (20 september)

Short description of error
Some strange behaviour of Rigidbody physics.
If you move these two objects a littlebit higher (> 0 for Z axis) then all works fine. Looks some troubles with negative z-values.
Video of this bug:
Sample .blend-file:

rigidbody_bug.blend1 MBDownload

Exact steps for others to reproduce the error
Start playing animation or bake all before it and play again.

Related Objects

Event Timeline

Denis (GMXArtist) created this task.Sep 21 2021, 9:12 AM
Denis (GMXArtist) updated the task description. (Show Details)Sep 21 2021, 9:16 AM
Denis (GMXArtist) updated the task description. (Show Details)
Evan Wilson (EAW) changed the task status from Needs Triage to Needs Information from User.Sep 21 2021, 11:02 AM
Evan Wilson (EAW) added a subscriber: Evan Wilson (EAW).

Thank you for the report.

If you go to Orphan Data in the Outliner, you will see a Sphere_instance that is greyed out. It is still being calculated as part of the Rigid Body Simulation. Right click on it, and select Delete. You now can rerun the simulation and it works as expected.

I have added it back into the scene in the picture below so you can see it.

I tried to remake your file but I couldn't. When I delete the second sphere, it gets completely deleted from the file.

Do you know how you made your file?

Pratik Borhade (PratikPB2123) added a subscriber: Pratik Borhade (PratikPB2123).Sep 21 2021, 11:04 AM
Denis (GMXArtist) added a comment.Sep 21 2021, 11:30 AM
In T91560#1222903, @Evan Wilson (EAW) wrote:

Thank you for the report.

If you go to Orphan Data in the Outliner, you will see a Sphere_instance that is greyed out. It is still being calculated as part of the Rigid Body Simulation. Right click on it, and select Delete. You now can rerun the simulation and it works as expected.

Wow, thank you for the described solution! I didn't know about it.

Do you know how you made your file?

Actually, no. As I thought I didn't do anything unusual while was creating that scene. Anyway I will try to replicate this behaviour in my next attempts.
Thanks for helping me!

Raimund Klink (Raimund58) closed this task as Archived.Nov 4 2021, 11:59 AM
Raimund Klink (Raimund58) added a subscriber: Raimund Klink (Raimund58).

No activity for more than a week. As per the tracker policy we assume the issue is gone and can be closed.

Thanks again for the report. If the problem persists please open a new report with the required information.