Certain blocks behave weirdly when breaking and replacing them on the same tick, such as:

minecraft:kelp_plant

minecraft:weeping_vines_plant

minecraft:twisting_vines_plant

minecraft:bamboo

Steps to reproduce:

1. Place down at least 2 Kelp, Bamboo, or Weeping/Twisting vines.
2. Left click and right click at the same time while looking at any block but the top.