Welcome and thanks for posting.
I have white-listed you, so you should be able to directly post in the relevant forum. In the meantime, let me post this issue to the relevant dev forum.
Thank you Prasad. Is there any additional actions I can perform to receive a response to this, or is it just a waiting game and I should remain patient?
We are getting very close to our release deadline and this issue remains outstanding. I am considering implementing a hack solution that reads the result of a test case and based on the result, disables the part of the effect that corrupts the heightmap data. So far, this is the only idea we have kicking around, and I'd much rather attack the source of the problem, not a symptom.