Closed Falling tree collision issue

While this isn't the most important issue in the game that requires immediate attention, it's still an issue that I found so I thought I'd offer my insight.

When trees fall over and collide with a solid object, they seem to "break apart" as it were, which causes a bit of a physics problem.

This issue is demonstrated in this video:



While I've clearly set up the scenario in the video, not even a minute before hand I had knocked down a tree where this issue occurred naturally.