"minecraft:structure_template_feature" only puts the structure, but don't puts the entities in it

In addons the said format type only logs the blocks of the structure to put in world, but not the entities, even if I put the structure from /structure command or structure block, the entities are present in it 

.mcstructure files with entities don't sends its entities to the feature files, this causes the feature in world appears without entities

Steps to reproduce:

1. Create an addon with the "structure", "features", and "feature_rules" files
2. Put this addon in your world
3. Create the world
4. Search the feature

Expected results:
The feature must contains the logged mcstructure file entities 

Obtained results:
The feature don't contain the entities 

The attached addon isn't mine nor I created it, but it shows the bug