Sometimes when trees of any kind are growing, some of the leaves will constantly appear, disappear, and reappear at the ends of branches. All you should need to do to observe this behavior is plant a growing tree and grow it to a stage where it has multiple branches.

Can anyone report with certainty that this is an interaction issue with Fast Leaf Decay?

Since nobody seem to have confirmed I can confirm that leaves are re-growing very fast when broke when mods that accelerate leave decaying are installed

This should now be fixed in dev. I cancel the NeighborNotifyEvent if there's an adjacent DynamicLeavesBlock.

Ok, I guess this mod is abandoned.

Darn. :(

This issue isn't solved yet. It's a known issue and we may either have to live with it as an artifact of how the growth cellular automata works or dig deeper into the problem to minimize it's effect. For the most part it should be rather slow and subtle and not a huge problem. If it's happening rapidly then it's not something I'm aware of as I'm not experiencing it rapidly on my end.

@63502 are you using this with Fast Leaf Decay?

I suspect the rapid flickering of leaves may be due to that?