A possible solution. So far zero crashes after creating around 20 reasonably large landscapes on 5.3 in LIT mode.
For some reason, the engine seems to be stable now after turning on Intel Vanderpool Tech (Virtualization Tech) from the BIOS. Should be called SVM for AMD users.
Hopefully this sticks. Will update the reply thread if it crashes again in a similar manner.
Leads, Some Korean developer blogs were suffering with a similar issue with their installation of UE4. https://nybot-house.tistory.com/31
Still don’t understand how this affects the engine stability since I don’t see how the editor depends on virtualization at all.