**System Information**
Operating system: Linux-5.11.0-7614-generic-x86_64-with-glibc2.32 64 Bits
Graphics card: Quadro RTX 6000/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.73.01
**Blender Version**
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-07-16 07:47, hash: `rB038345fa5650`
Worked: Caused by {bfa3dc91b75407b063f2ac991b176d98c050f92d}
**Short description of error**
When realizing many instances from a collection info node, often many instances will fail to appear. It happens more often when there are more instances, and it depends on threading.
{F10226050}
{F10226054}
**Exact steps for others to reproduce the error**
Open sample file, enable viewport visibility of `Plane` object. Repeat.
Simpler example:
Toggle visibility for the "Points" object. Repeat until only some instances appear.
{F10226249}