Forseti The,
I assume you currently have no problems.
I am not excluding the possibility that at the time there was a problem for several hours.
I have now found out that the huge numbers of shuttles moving, created very large detailed logs and these were kept for many days.
these large logs accumulated to a level that at one point made the processing stop.
processing is intensive and runs all the time to keep moving the shuttles.
I have in the mean time much reduced the number of logs kept online and the problem disappeared.