If you jump on farmland and that famrland gets back to a normal dirt block you get stuck to it
Here is a video i explain it better
https://www.youtube.com/watch?v=SdLr_AtjTBQ&feature=youtu.be
(Sorry For My bad English i am Greek)
Environment
Windows 10 ,4GB DDR3 Ram, AMD A6-6310 APU With AMD Radeon R4 Graphics
Bug Has been already reported sorry for the dupe