The bug
If the targeted block is an empty cauldron, blocks can be placed. However, if the targeted block is a full cauldron, the same blocks cannot be placed.
Linked issues
is duplicated by 4
relates to 2
Attachments
Comments 36
Further testing shows chests and shulker boxes that can't be opened, and beds during day will not allow blocks to be placed on them. Should I add these?
Confirmed for 1.13. However to avoid this, press your sneak key then place the block.