In 1.0 B309, I haven't seen this anywhere else in this forum but I've experienced many instances of chopping down a tree and I get the 2 seeds when done but no tree fall animation or sound of it falling. It is intermittent but frequent, once it starts it seems to be fairly consistent. I thought I had a correlation to crouching vs standing but that doesn't appear to be the case. Type of tree or tree HP doesn't seem to matter. One time it was more like a very long delay as the animation and sound happened after I started to chop a stump close by.