Was the fire on the ground or in a building/first floor/any floor? There is a known issue that a fire does not radiate heat when _not_ lit outside and/or on the ground.

We would thus have of to make the fire outside of the building? Or in the rez-de-chaussé?

The fire also doesn't work inside a building (or most of them) on the ground floor. It lights up fine but you won't "Slowly warm up". You're best doing it outside if you can. Under a tree works if it's raining. I'd suggest you try lighting your fires in one of them small bunkers/sheds. They seem to work just fine in one of those. Hopefully they'll fix this soon.

I had the opposite problem. I lit a fire on the top floor of the construction site building (the unfinished building) close to Berezino, inside the walls, just by the stairs. No effect, and I didn't get warm. Then I went down and into the restaurant/pub right across the street, closed the door and re-lit the fire. Instant effect, and I became warm.

Hi Braetheld,
thank you for your report!
There have been some tweaks to this recently and they seem to have fixed the issue.
Please submit a new ticket if the issue persists.
Regards,
Andy