It was a regression from the SciMLBase change. Fixed in Fix AD of ensemble problems with threading by ChrisRackauckas · Pull Request #647 · SciML/DiffEqBase.jl · GitHub
It was a regression from the SciMLBase change. Fixed in Fix AD of ensemble problems with threading by ChrisRackauckas · Pull Request #647 · SciML/DiffEqBase.jl · GitHub