Seems to be occuring everytime, and in any Phone and Tablet. Furnaces don't show the Fire animation when lit up.
Linked issues
duplicates 1
Comments 3
The fire particles are coming out the back of the furnace which is explained here MCPE-10760
The fire particles are coming out the back of the furnace which is explained here MCPE-10760
The fire particles are coming out the back of the furnace which is explained here MCPE-10760