in mc:1.8.6 I have (sort of) recreated this bug
and how:
place a dispenser facing into a stair block
hook up a fast clock (I used a comparater clock) and run it
ever wooden button from the nearest chunck pos 1 0 1 to 14 1 14 (lowest xyz to highest xyz) will now nolonger unpress
aka: the dispenser at: 794 11 -828
from: 782 15 -834 (chunk: 1 0 1 in 48 0 -53)
to: 801 17 -815 (chunk: 14 1 14 in 50 1 -51)
@Ender Dragon if I didn't see that comment of your's I would've opened a thread containing a bug that was only me not knowing that a mid-air jump is required.
however I wouldn't call this a complete fix, making it a smoother change from flying to standing, I would say is required, although it would be difficult to do, because I think minecraft has some constraints making it harder then it should, it still is a required feature.