The recipe for Stone Slab does not display the 3 stone needed, but crafting it consumes the 3 stone as expected.
This bug does not affect 0.15.10.
Tested on Samsung Galaxy S6 (SM-G920W8), Android 6.0.1 MCPE 0.15.90.8
MCPE-17542
Stone Slab MATTIS recipe missing Stone blocks
Resolved
Fixed
2
(Unassigned)
Confirmed
Phone - Android - Samsung Other (Specify in description)
Android 6.0.1
0.15.90.8, 0.16.0
1.0.0
Retrieved
Also happens in the 0.16 version. My device is a Samsung Galaxy Tab 3V with Android 4.4.4 Kitkat(Samsung T116 NU)