Found in both survival and creative game modes; if you walk up certain steps/stairs your character will do an extra hop or bounce. This appears to happen at different conditions and scenarios but mostly happens when there is only one stair block followed by a solid block. Not too big of a deal but can get annoying.
To recreate:
1. Make a path going up a mountain or hill
2. Use stairs to match the incline
3. Go to the bottom and follow the path up
4. There will be some cases where you will do a "double jump" after going up some of the stairs
