Fire is broken in Android experimental

When I stock a deployed brazier with planks,splintered wood etc it seems to only burn for a few minutes.
The tinder(splinters,paper) are always consumed but a few burnt planks are left.
Replacing the tinder and reigniting the fire burns the rest of the planks at some point but still only lasts less then five minutes.
I’m playing 0.D 5519-g21b6242.
In the stable version, a few four-by-twos would keep the fire going for 2-3 hours.

Integer Overflow…
If I looked at the fire straight after I lit it it said “without more fuel this fire will burn for 54 years” then it would go to 24 minutes and last less then five.