Many of my scripts and automations are broken with the latest HA update that includes a jinja update.
I used to be able to do things as follows (given there’s a variable named heat)
variables:
other: "{{ heat['fan on'] | float(0) + ... }}"
But with recent changes these fail when there is no value looked up.
The solutions is to capture the lookup into a variable, then perform the arithmetic.
variables:
temp: "{{ heat['fan on'] }}"
other: "{{ temp | float(0) + ... }"
Something is really wrong here as this doesn’t make sense. And I have to rewrite many scripts/automations with this unexpected and illogical change.