Before this update (v1.21.80) block placing in a line worked as intended, however this update after being applied is unable to recognize after 2-4 blocks being placed rapidly in a line and thinks the blocks were not placed at all, putting the supposed placed block back in inventory and breaking the action of placing the blocks by the player. This can be replicated at any time with a decent stack of blocks, placing them in a line horizontaly at Speed 3 or higher or toward the player from four blocks away. I saw this on Switch, may happen on other bedrock platforms too.
This issue is being tracked at MCPE-217295.