Placing blocks and swapping them into different hands at the same time causes failed block placement

While placing blocks, it's possible to swap hands at the perfect time to avoid placing a block, causing the player to sometimes walk off a block when in a crouched position.

Notes:

• It seems to be a timing issue, so it doesn't happen with each block
• It doesn't appear to be directional, reproducible in each
• Swapping with two stacks of blocks doesn't cause the player to fall
• Happens if pressing instead of holding buttons down as well
• When it occurs, the block place is cancelled? It temporarily appears and disappears
• Unconfirmed: Only happens on primary -> offhand swaps?

Steps to reproduce:

1. Hold blocks in a single hand
2. Place blocks while repeatedly swapping hands