Another question would be: Is the issue only present in games that don't have the tree placed and is it actually a 1.63 patch issue/ITF or did it occur before ?
I don't have the EP but I do have the patch, so I guess I could try it but the issue is that you're saying it doesn't appear right away. I don't really have that much time to test. Still many post need to be written.
There must be some other factors involved or many more people would have this issue. It seems that once you have the bug, it spreads and it's due to the tree but what makes it occur in the first place ? What is firing those alarms ?