I felt that the communication in PR was not clear. Even about this, the cube was heavily instrumented.
Per https://news.ycombinator.com/item?id=21306452, we have results for both instrumented and uninstrumented cubes!
Our cube variants are listed in the blog post ("Behind the scenes: Rubik’s Cube prototypes"), and results are in the paper in Table 6.
To be clear, that means executing up to 100 moves without a drop. If you put the cube back in the robot's hand, without any additional effort it'll continue solving unfazed.