[1.1.63] Steam version, but happend also on 1.1.61

Steps to reproduce:

1. grab a stack of Uranium-238 from the warehouse 2x7
2. wait like 5-15 sec until there are some uranium ores on the belt below the centrifuges
3. some Uranium-238 is made..
4. crash (most time i get no error message and no end ...