Procedural Foliage Volume: Simulate() function doesn't work in Blue Print

Procedural Foliage Volumes can be resimulated by clicking the Resimulate button. But they can't be resimulated from Blueprints, even if there is a Simulate() function that can be executed.

Found in 4.20 CL# 4369336, 4.21 CL# 4753647, 4.22 CL# 6063286, and 4.23 CL# 6395561

1. Open attached project
2. Select the ReproBP
3. Click the button labeled "SCALE DOWN AND RE-SIMULATE" in the details panel of the ReproBP

Results:
The mesh will scale down but the procedural foliage will not update

Expected:
The procedural foliage would update with the mesh upon using the Simulate() command