Field empty results with Entity or Paragraphs

I think I have to pump this.

Same with:

Drupal core 10.2.6
GridStack 3.0.2
Paragraphs 8.x-1.17
Paragraphs Asymmetric Translation Widgets 8.x-1.3

div.box__content stays empty if I choose something else than "Gridstack Paragraphs" it renders.

Thank you.

Mind replacing this line:
https://git.drupalcode.org/project/gridstack/-/blob/3.0.x/src/Engine/Gri...

From:
'box' => $this->manager->toHashtag($item, 'box'),

to
'box' => $this->manager->toHashtag($item, 'box') ?: [$item],

I'll need to check this later if any side effects, but if that works for you, it will be a good start.

Yet again. Thank you very much. That worked.
For some odd reason kinda the same solution can we prevent that for the future somehow?