I tested the command /emergesblocks but this did not cause any block.
He must have a similar return to that:
Started emerge of area ranging from ...
Finished emerging n blocks in ...
But the only return we have is:
Started emerge of area ranging from ...
No block is generated even if you wait five minutes.
I used some scripts to verify that the block was loaded and always returned "ignore" to the coordinates where it should have been generated new blocks.
This is a critical error in minetest?