After the update: Duplicating (Ctrl+D) unanchored parts/models is broken

After the last update, the behavior for duplicating parts (ctrl+D) changed.

When you select an unanchored part and hit Ctrl+D, the part is duplicated as normal but its physics start being simulated for a while, then they “rewind back”, sometimes incorrectly.

To reproduce, simply duplicate any part using Ctrl+D (make sure the part is unanchored). It happens more often on Team Create.

Unanchoring models sometimes yields the same results (it’s not running):

This should be fixed upon restarting Studio:

Please be sure to check for existing threads when making a new one.