Custom leaves

[anvian]

I have created some custom leaves but when they appear in a new custom tree, they disappear over time. 

[fweo]

Do you have custom wood for the tree also? If the leaves do not recognise your tree's trunk as wood, they will decay as if there is no wood around. From memory, your wood needs to be tagged as a log using vanilla's tagging system (tag your leaves as leaves while you're at it). If that does not fix it, try placing a vanilla log next to the leaves as they're decaying, that will tell you if the problem is with your leaves or your wood.

[Luis_ST]

9 hours ago, anvian said:

I have created some custom leaves but when they appear in a new custom tree, they disappear over time. 

as fweo already said you Log must be in the vanilla logs tag, this will fix your problem.

if you not have any kind of Log you need to set the persistent BlockStateProperty to true when the Block is placed
or you need to override #tick in your Block class

[anvian]

adding the log to the vanilla log tag solved the problem.