Minecraft wiki entry for Development_versions, associated text: MC-142134 – Light sources are spontaneously not working in some chunks.
MC-148933 – The player cannot swim while sneaking.
MC-149111 – When hovering over a world that needs to be updated, the game calls the current version a snapshot even if it is a release.
MC-149916 – Teleporting long distances on servers causes you to clip into the ground.
MC-150501 – Some Hebrew letters are not included in the Minecraft font.