Stange behaviour with fence posts disappearing when attached to another fence with a lead

While playing a hardcore vanilla superflat world, I had a lead attached to a cow and a fence in my main hand. Upon attempting to tie the cow to the fence, I simultaneously placed a fence, which was kind of like a ghost block. It depleted the count of fences in my hotbar and it tied off the cow to the existing fence post, but no new fence post or collision model appeared in the world itself. Upon breaking the existing fence post, two fence items would appear in my inventory with only one item entity spawning to indicate the broken block.

Link to video on Google Drive: https://drive.google.com/file/d/17WqiEPyKbPJ0698jMTGmfrlz8ZsksyZA/view?usp=drive_link

Link to Video on Youtube: https://youtu.be/0CaA8iaT-M4