really really sorry, I am out of ideas…
are you using custom markdown cards? [[]] indicates you are.
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Yes, that’s the problem, i discovered inside the resources part of ui-lovelace i still had markdown-mod custom card… now removed it and voilà… it works !!
But now i must modify all my markdown cards ?
The answer is yes… now i have problem with other markdown cards… how to change them in place of [] ?
seems like it. I don’t know if the code is 1 to 1. You’d probably need to add states. to all your current state objects and replace [] with {{ }}.
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as said, markdown excepts full jinja templating, so simply use templates that work inside the template editor, and you’ll be good.
of course, you can also still use Markdown, and, if you have card-mod installed, use style:
best of three worlds 
only now notice I copied the ‘incorrect’ name for the 3d sensor, which would better be called state: (vs time: ) imho.
Yes, i already changed them and translated into italian 