Instance Static Mesh instance doubles when upgrading from 4.18 to 4.19 or higher.
According to Licensee, manual check is difficult.

Steps to Reproduce
  1. Open attached project. This project is 4.18.[Image Removed]
  2. Confirm the Instance Static Mesh component of NewBlueprint being spawned at the level.
    [Image Removed]
  3. Close Project. Open that project with 4.19.
  4. Instance Static Mesh component instances doubles.
    [Image Removed]

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ComponentTools - Foliage
Affects Versions4.194.20
Target Fix4.21
Fix Commit4439395
Main Commit4450599
Release Commit4439395
CreatedSep 4, 2018
ResolvedOct 9, 2018
UpdatedOct 11, 2018