Now that you mentioned that you are rendering with Commandline, what you experienced with version 121 was that the tree was rendering with 4 levels instead of 5.
We added support to Commandline rendering after version 121, which means that in version 121, you were rendering with the viewport levels ...

Hello,

The scene renders fine in the latest Forester, in fact faster than the older version 121.
What I did was reduce the branch segment count from 18 to 10 and branch sides from 8 to 7. Rendering the same scene on the older 121 consumes more memory.
Memory consumption started at around 30% and ...