I opened case CAS-0010342135 on 12/13 which is still being actively investigated if you would like to compare notes.
We have logged a total of 8 crashes since upgrading to 188.8.131.52 and they have all occurred around the 23:50 timeframe. Nightly reboots do not seem to mitigate the issue and they have occurred anywhere from 1 to 10 days apart.
Perhaps if we found some commonality between our installations we might find the cause and resolution for this issue. If there is any other information I can provide that might be helpful, please let me know how I can help.