I have variable in my script:
{{ f_areas|map('area_entities')|map('select', 'in', label_entities('Music'))|flatten|list }}
The f_areas field is the script field, area array selector.
This script is always unavailable on HA start on latest HA version, although:
It works perfectly in Dev template section, and if I change script and save it, still works good.
The problem is "flatten filter not available".
What the hell is going on?