Nv04Unmap: ummap failed

NVIDIA Driver Version
515.43.04

GPU
RTX 3080

Describe the bug
I see the following in dmesg:

[   39.219138] NVRM rmapiUnmapWithSecInfo: Nv04Unmap: ummap failed; status: Requested object not found [NV_ERR_OBJECT_NOT_FOUND] (0x00000057)
[   39.219922] NVRM serverFreeResourceTree: hObject 0xbeee0100 not found for client 0xc1d0003c
[   39.225971] NVRM rmapiUnmapWithSecInfo: Nv04Unmap: ummap failed; status: Requested object not found [NV_ERR_OBJECT_NOT_FOUND] (0x00000057)
[   39.226877] NVRM serverFreeResourceTree: hObject 0xbeef0100 not found for client 0xc1d0003c
[   39.892724] NVRM rmapiUnmapWithSecInfo: Nv04Unmap: ummap failed; status: Requested object not found [NV_ERR_OBJECT_NOT_FOUND] (0x00000057)
[   39.893505] NVRM serverFreeResourceTree: hObject 0xbeee0100 not found for client 0xc1d0003d
[   39.899565] NVRM rmapiUnmapWithSecInfo: Nv04Unmap: ummap failed; status: Requested object not found [NV_ERR_OBJECT_NOT_FOUND] (0x00000057)
[   39.900542] NVRM serverFreeResourceTree: hObject 0xbeef0100 not found for client 0xc1d0003d

More appear when I run nvidia-bug-report.sh. My display locked up on my first attempt to report this.

To Reproduce
I assume this is IOMMU related.

Expected behavior
These errors should not appear in dmesg.

Please reproduce the problem, run nvidia-bug-report.sh, and attach the resulting nvidia-bug-report.log.gz.
nvidia-bug-report.log.gz

Start with the attached nvidia-bug-report.log.gz and the dmesg entries in the issue, then review how nvidia-bug-report.sh triggers the errors. Reproduce on the reported RTX 3080 and driver version, including the suspected IOMMU conditions; done requires identifying a reliable cause and a verified resolution for the failed unmaps.