OfflineRigidbody breaks Character Joints

[SimEof]

General
Unity version: 2022.3.21
Fish-Networking version: 3.11.18
Discord link: https://discord.com/channels/424284635074134018/1034477094731784302/1239501696938283038
https://discord.com/channels/424284635074134018/1034477094731784302/1239857739946131486

Description
Using the OfflineRigidbody on a ragdoll with Character Joints break these joints and the ragdoll stretches and does not return to normal form. I did some testing it the main culprit is SceneManager.MoveGameObjectToScene inside the RigidbodyPauser. This only happens for clients as reconciliation only happens for clients.

Replication

1. Have a test scene with a character with character joints, rigidbodies, colliders and OfflineRigidbody component and its top level with GetInChildren set to true;
2. Create a build that will act as a host/server;
3. Join the server inside Unity Editor for it to act as a client;
4. If needed disable characters Animator and set all child rigidbodies to not be kinematic;
5. Once the character is not kinematic and he falls to the ground its joints should already be brokent and once the body is moved it should stretch and not return to its normal form.

Expected behavior
Character Joints are not broken by OfflineRIgidbody and Ragdoll is disconnected from TimeManagers manual Physics simulation.

Screenshots

[FirstGearGames]

We do not support V3 anymore but it's very possible this could still exist in V4.
I noticed you did link Discord but the issue was not actually troubleshot.

If you could make a very basic test scene and provide steps on how to use the step scene to replicate I'd be happy to take a look.

[FirstGearGames]

Closed due to inactivity.

[NiekZndt]

This bug appears to still be a problem as of version 4.6.9. Having any hinge joint with a rigidbody will completely break as soon as you attach an offline rigidbody to it (or a parent with search in children enabled) so it should be really easy to recreate. It seems to specifically break on the hinge joint that is connected to the anchor (so with auto configure disabled). But all other hinges function strangely aswell.

[FirstGearGames]

A few months ago we started requiring all testing to be done on the latest version, and have a test project provided.

But, that component has not been touched for a very long time so I suspect even today this issue exist. However, the OfflineRigidbody only pauses the the rigidbody, and resets the values for it. A lot of the Unity components, most likely joints included, do not expose the settings which must be reset. In other words, this is most likely going to end up being a Unity limitation.

I'll re-open the issue to have it looked at, but keep in mind this might not be solvable due to the Unity end.

[NiekZndt]

Thank you for the swift response. It would be nice that the problem is documented in the fishnet docs in that case or to have a fishnet alternative for the joints instead. The latest fishnet version contained so many csp problems that it was pretty much unusable for us, which is why we are still on 4.6.9

[FirstGearGames]

The CSP bit is confirmed and as of about a week ago the causes isolated; the next update will likely have resolution for them as that's the primary focus of it. The joints component, and other like components such as spring component, is going to potentially be challenging and maybe not even resolvable, depending. I do not know with absolute certainty this moment, but I just want to set expectations as to state the obvious - I cannot change Unity.

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On Mon, Dec 8, 2025, 10:19 AM NiekZndt ***@***.***> wrote: *NiekZndt* left a comment (FirstGearGames/FishNet#671) <#671 (comment)> Thank you for the swift response. It would be nice that the problem is documented in the fishnet docs in that case or to have a fishnet alternative for the joints instead. The latest fishnet version contained so many csp problems that it was pretty much unusable for us, which is why we are still on 4.6.9 — Reply to this email directly, view it on GitHub <#671 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AGPJC3WUWOBM5LPD2QXBUD34AWJGXAVCNFSM6AAAAACOMB2NJOVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTMMRXGQZTCOBQGY> . You are receiving this because you modified the open/close state.Message ID: ***@***.***>

[NiekZndt]

Alright that is good to hear! Thanks for the replies!

[FirstGearGames]

Also, I feel like this is something that is worthy of a bug bounty because it is not exactly high priority for us to be honest, and time is a bit stretched at the moment (suppose it always is). If I recall correctly it is simply because when an object is set schematic the other physic components lose their velocities and as mentioned they cannot be reset. If you do happen to have some spare time and want to take a look let me know if you find a resolution and we can discuss payment.

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On Mon, Dec 8, 2025, 10:28 AM NiekZndt ***@***.***> wrote: *NiekZndt* left a comment (FirstGearGames/FishNet#671) <#671 (comment)> Alright that is good to hear! Thanks for the replies! — Reply to this email directly, view it on GitHub <#671 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AGPJC3UB5LJOQNYRUQQIIVL4AWKKXAVCNFSM6AAAAACOMB2NJOVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTMMRXGQ4TCNRQGM> . You are receiving this because you modified the open/close state.Message ID: ***@***.***>

[NiekZndt]

If I can find the time, I'll look into it and let you know!