creating a container into a container collapses tree instead of expanding

[DeepSOIC]

1. create Part
2. create Part

-> tree view is fully collapsed, instead of being fully expanded

OS: Windows 10 Version 2004
Word size of FreeCAD: 64-bit
Version: 0.20.26155 (Git)
Build type: Release
Branch: master
Hash: 0926a4148bcff11249fd4f56bc30256102ffe105
Python version: 3.8.6+
Qt version: 5.15.2
Coin version: 4.0.1
OCC version: 7.5.0
Locale: English/United States (en_US)

[DeepSOIC]

it seems to be related to #17, as that (#17) is what happens when Part is added but not activated (with py console). #17 alone is not reproducible anymore.

I have tried fixing it with 0.20.26115 and gave up.