Bonemeal does not grow tree saplings into trees

When I sprout the mud, then when the tree grows, it remains dirt instead of logs.
Acer Iconia Tab A211

rplatham edit: The original bug report and pictures below refer to MCPE-8094, but the other bug (the one in the title) is the one I have been testing. Basically, bonemeal doesn't work on tree saplings. I've tested in a new pure survival world and in new creative converted to survival worlds.