I have not been able to reproduce this problem after many intensive tests. However, the '0000000000000008' access violation error is similar to the same problem that was reproducible in version 1.8.8-4 after recent Windows updates. This problem has been avoided in version 1.8.8-5, although obviously not completely, as this report demonstrates.
There is little more I can do to prevent these problems from happening for now. These access violations don't originate from our code, and there is no way to reproduce them consistently. This does not happen on FreeBSD, Linux and macOS executing exactly the same code, and most of the time it doesn't happen on Windows either. I am very sorry for these issues, and will keep doing my best trying to solve them. For maximum stability and performance, I recommend running PixInsight 1.8.8-5 on Linux.