If you watch the video without reading the dev blog entry on xandercat.com, just note that the first test area has a 3x3 floor with standard mesh colliders, while the second has a 3x3 floor with a mitigation strategy using planes instead of the floor mesh for collisions which works pretty well.

We will be trying the latest version in the 6000.0 line to see if that resolves any of these issues. There are some reports that the "Internal: JobTempAlloc" issue may be resolved in 6000.0.59f2 or later.

Full error messages (as they had to be shortened in prior post): "Internal: JobTempAlloc has allocations that are more than 4 frames old" (presumably "4" can vary), and "Invalid memory pointer was detected in ThreadsafeLinearAllocator::Deallocate!"