I don't know why. But whenever I let my trees mine for long enough, without anywhere for the items to export to (so just placed on the ground with axes in their inventories) After a while they slowly lag my game to unbearable levels. I had only 10 placed down in a 5x2 pattern, and after 3-4 hours I was getting less than 5fps when I looked at them. Only config I changed was the axes took damage, and increased the chance they took damage. Maybe a mod incompatibility? But I don't know of what. Only thing that comes to mind is "Bigger Stacks" But I only set the values to 128-logs, planks, leaves, & 256-saplings. I only point this out as a potential issue, because I know the UI doesn't properly let me stack the items back to their modded values of 128, instead giving me multiple stacks of 64, even though they store at their modded values of 128 or 256 while inside the bonsai pot.
I ended up just uninstalling the mod because the lag was so bad and uncontrollable. Would love to know if there's a way to try and fix this or if I'm doing something wrong on my end with this mod. Like using incorrect integer rounding for the axe damage chance or something? IDK.

Which minecraft and mod version was this on?