The block properties would be missing

[bGZo]

Here is my template

template:: Placeholder
template-including-parent:: false
- title:: 
  desc:: 
  tags:: 
  url:: 
  mark:: 
  start:: 
  end::
  collapsed:: true
  - Placeholder
    - Placeholder
      background-color:: grey
      collapsed:: true
  - Placeholder

When I use SmartBlocks, what I get

- title:: 
  desc:: 
  tags:: 
  url:: 
  mark:: 
  start:: 
  end::
  - Placeholder
    - Placeholder
      backgroundcolor:: grey
  - Placeholder

Basically the style of template is missing, like properties of block (collapsed:: & background-color::), it's not same as build-in insert way of template.

I am sorry but I have not found any possible solution right now. 😂 Maybe a while.

Is that a bug?