I think I have the same issue as well. Unrelated to any use of the sampler, when I preview factory content (loops and drumkits) on the media bay on the right panel, cycling through some loops and within 5-10 previews cubase will crash.
Attaching the crash dumps below.
Cubase 10_2019-08-19-091252-MacBook-Pro.crash (128 KB)
Cubase 10_2019-08-19-090007-MacBook-Pro.crash (126 KB)
Cubase 10_2019-08-19-005848-MacBook-Pro.crash (149 KB)