Ah, I see. That makes sense. TP 130472 is the latest beta, my stable is 129876. I had the sparkling tree issue in SP5 so I applied the Hot Fix to it to fix the trees. I tried it in 130472 just now and it works there too, So whatever was wrong must be fixed as you said.
I tried it in both versions of surveyor and HD terrain and 10m grid. All good.