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Collection instances controlled by proxy armatures sometimes have the instancing empties transformation applied
Confirmed, NormalPublicBUG

Description

System Information
Operating system: Linux-5.3.0-29-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: GeForce RTX 2080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 435.21

Blender Version
Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-12-04 11:32, hash: rBf1aa4d18d49d
Worked: Works fine in 2.80

Short description of error
A rigged object is linked into a scene, and a proxy armature is created and animated. When rendered, there are glitches in some random frames, where the object moves out of position.

Exact steps for others to reproduce the error
See the attached production/scenes/scene02 .blend file. The cow is rendered with glitches.


Edit: updated test file:

Event Timeline

Per Klason (perklason) updated the task description. (Show Details)
Campbell Barton (campbellbarton) changed the task status from Needs Triage to Confirmed.EditedMon, Feb 10, 8:26 AM
Campbell Barton (campbellbarton) changed the subtype of this task from "Report" to "Bug".

The empty that instanced the collections sometimes has it's transformation applied before the proxy, causing the object to flicker to a different location.

It's possible to redo this error without rendering.

With the updates test file:

Hold the "Enter" key with the cursor over the "cow" collection.

Key repeat causes the checkbox to flicker on/off. Sometimes the cow will be upside down.

Campbell Barton (campbellbarton) renamed this task from Render glitch with linked armatures to Display glitch with proxy armatures.Mon, Feb 10, 8:29 AM
Campbell Barton (campbellbarton) renamed this task from Display glitch with proxy armatures to Render glitch with proxy armatures.
Campbell Barton (campbellbarton) updated the task description. (Show Details)
Campbell Barton (campbellbarton) renamed this task from Render glitch with proxy armatures to Collection instances controlled by proxy armatures sometimes have the instancing empties transformation applied.Mon, Feb 10, 8:31 AM