One post, no return, vague negative FUD. Hmmm, why don't I believe this? Oh, ya, now I remember: There have been essentially no Leaf fires in seven years.:
1st one was a forest fire (total loss, but not the Leaf's fault),
2nd one was L1 plug caused a small amount of damage in the garage wall (again, not the Leaf's fault since Nissan doesn't recommend L1 charging even though many do and it's relatively safe if done properly). No damage to the vehicle.
3rd one was actually something interesting. IIRC, it was posted on MNL. The owner smelled electrical fire in the cabin, felt heat near the shifter, pulled over, safely exited the vehicle and called for assistance. A fire eventually formed and damaged the car. Maybe totaled.
So, out of hundreds of thousands of Leafs, only one real fire. Maybe this is number two, but until the OP returns with pictures, news articles, fire/police report, or other corroborating evidence, let's move on.