Creative Mode hitboxes for placing or destroying blocks is not working properly. This bug started in 1.18.0 and continues in 1.18.12 Hotfix. I'd try to place a command block (for example) and it takes much repositioning to actually place it. Same for destroying, I primarily get the missed strike sound instead of a block literally 2-3 blocks in front of me being destroyed. 

Steps to Reproduce:

1. Open a creative world
2. Try placing/destroying blocks.
   1. If you can with touch, try using a keyboard and mouse.

Expected Result:

Blocks place when tapped/right-clicked in any position of your character and break when tap & held/left clicked in any position of your character.

Observed Result:

Blocks fail to place or break unless you are in the right position for the hitbox to actually appear.

Additional Context:

In this clip linked below, I tried placing and destroying command blocks in creative using keyboard and mouse. I also switched off outline so the glass or command blocks would highlight to make selection for placement/destruction more visible.

Video of bug