well being that i have pictures i think a description isn't needed. however in one birch wood forest the trees all align into a pattern of what would you say graphing paper pattern. hope this helps with your problem and i took multiple and looked in to different place's and got the same results.
and as for the environment you'll be able to see it in the screen shots i took.
Hi there!
This looks like a duplicate of MC-194200. If you’re not doing so already, make sure to do a quick search for your bug before posting it, and if you find a report that matches yours, vote for it, comment on it, and watch it. It's the best way for the bug to be prioritized by Mojang.
For this bug, a Minecraft developer has already been assigned to fix the bug, so we should definitely expect a fix before 1.16.2 is released.