Do not show empty layout regions. Hide if empty option.

Hi ,
can you help me in which twig file you are finding this issue or on which page. I am unable to reproduce

you can hide empty regions in twig by using the render argument with {% if region_name|render %} {%- endif -%}

I can confirm the same situation occurs with Display Suite, but have not had a chance to dig into it further (I plan to return to this question in a few weeks, once a few other concerns are cleared away).

To reproduce:
Drupal-8.5.3
Bootstrap_Layouts-8.x-5.1
Display_Suite-8.x-3.1
Bootstrap_8.x-3.11

With Bootstrap as default theme using all defaults (CDN is jsDelivr-3.3.7)
On the Article content type, select a 2-column stacked layout
Place fields in layout:
- title in top
- description in left
- comment in right
Create an article with a title and no description. On save, comment form appears in right column with nothing in left column. Left column classes: col-sm-6 bs-region bs-region--left

Safe to assume the template is bootstrap_layouts/templates/3.0.0/bs-2col-stacked.html.twig?

I'll turn on debug in a future pass and add more specifics.

I don't think there is many things that can be done from the side of this module.

For a custom layout I use

{% if content.REGION|render is not empty %}

Suboptimal, but Drupal sends empty render arrays to twig. (I think)