It is no longer possible to interact with blocks while sneaking. This has presumably been done to give a way for blocks to be placed against other blocks like crafting tables. However, there are some side effects to this change which may be unintended.

The following actions are no longer possible while sneaking, and probably should be (NB this is not an exhaustive list):

• Entering a bed
• Opening/closing a door
• Clicking a button or lever