Vines do not burn when player leaves the area of the fire then returns later

Samsung Galaxy S4 (phone) and Galaxy S4
See also: https://plus.google.com/102135312864378831179/posts/dvghRKjhjvD and https://plus.google.com/102135312864378831179/posts/6gAELsPbcJr

Description
If you set a fire where there are vines, leave and come back after the fire is out, the vine are sit there. Affects creative and survival modes.

How to Reproduce
Find a vine covered forest or make some vine covered flamable stuff. Light it on fire and then leave. The player must move a distance away from the fire that is greater than the chunk refresh distance (5 chunks?) and greater than the player's render distance. Return after an amount of time that the structure should be entirely consumed. If you come back too early, you will see the stages of the fire replay very quickly (generally with lag) and nothing will be left, as expected. If you come back late enough, you won't see the fire replay its stages, but the vines will remain. I expected the vines to burn too, as they would if you stuck around to watch the fire in the first place.