In all gamemodes, if you have water surrounded by stairs, and have glass panes on top of the stairs, when you walk into the pane it will make you jump.
I've attached an image of how to replicate.
MC-27127
Stair/Slab Water Hop
Resolved
Duplicate
0
Guy Mawson
(Unassigned)
Unconfirmed
jump, water
Minecraft 1.6.2
Retrieved
Thats not really a bug.. the issue is that you being pused by the water into the stairs climbing part of its hit box at the same time so it thinks your jumping out of the water but only because the glass is confusing the actual stair clibe hit box since its on the middle of it