Very poor performance on simple nested prefab

[S'Mores]

I have a prefab that contains four instances of another prefab. When I expand the parent prefab, Unity hangs for tens of seconds and prevents doing anything productive until the parent prefab is collapsed.

The hierarchy is as follows:

Archway * Arch (ProBuilder mesh) * Pillar (ProBuilder mesh) * Pillar (ProBuilder mesh)

Corner * Arch (ProBuilder mesh) * Arch (ProBuilder mesh) * Pillar (ProBuilder mesh)

Room (This is the problem one) * Walls (ProBuilder mesh) * Archway (Prefab) * Archway (Prefab) * Archway (Prefab) * Corner (Prefab)

The prefab hierarchy is only two levels deep and I am aghast that the product is choking on this simple example. I can only hope this is a one-off anomoly and not a fundamental design issue.

[Devon Klompmaker]

What version of uPrefabs are you currently using? I'd like to get you on a beta version for updates. Can you please email me at [e-mail] with your invoice id.

Thanks,

[Devon Klompmaker]

1.4 submitted and under review in the asset store. It should be resolved within that version.