Error "Internal_SetPosition can only be called from the main thread." is present when using TransformHandle in main thread

Thank you for reporting a bug to Unity. In this case the behavior was deemed not to be a bug and is job safety behaving normally. TransformHandle methods are not allowed to work in jobs, there is some patching of special job types (IJobEntity) to automatically run on the main thread outside of the job system, but this is an exception and we are aiming to make job behavior as standard as possible between the different job types. We are introducing a new Transform job type (TransformRef) for jobs in an upcoming Unity release (check out the 2026 Core Engine GDC roadmap for more details).

Thank you for reporting a bug to Unity. We have reviewed the issue carefully, and in this case, the team is unable to prioritize fixing this bug. There are a number of reasons we make this decision, including the impact and severity of the issue across our user and customer base, and the possibility that future plans may solve the problem in a different way, or that a workaround for the bug may be available. Today we will be closing this case. Thank you again for taking the time to report this issue, and please let us know if there is anything else that changes the impact or severity of this issue.

Thank you for reporting a bug to Unity. We have reviewed the issue carefully, and in this case, the team is unable to prioritize fixing this bug. There are a number of reasons we make this decision, including the impact and severity of the issue across our user and customer base, and the possibility that future plans may solve the problem in a different way, or that a workaround for the bug may be available. Today we will be closing this case. Thank you again for taking the time to report this issue, and please let us know if there is anything else that changes the impact or severity of this issue.