How to produce this bug:
1. When you "Chop Small" a tree, the logs will stack.
...bug #1: sometimes out of order, but that's immaterial bug - they take shape of 6 around you instead of a log pallot

2. Do not use the logs for a day or two
...bug #2: logs will "drop" in height and appear as though only 1 log is on the ground instead of 4-high (you can still use the log 4 times)....
...most of the time (see Bug #3)

Bug #3 (most important one) Not every time this happens logs are still usable. And this is the most important bug, cause you can't do anything with an object but start at it - and it could be taking up an important space in your tribe land, or somewhere where you will want to build a road. The log just sits there and cannot be right clicked (menu does not come up), so you cannot "pickup", or "chop firewood".

Examples of such logs at the moment:
(PvE Server)
Zone 855, x552 z69 (2 together)
Zone 855, x556 z75
there are others, but these 2 examples should be enough.

After some time passes (a few days, or a week, or a few server restarts, unsure) log may become usable again - but who's going to keep checking every day?

Thanks for looking into this.