When a Ravager is pushed into leaf blocks it will appear to destroy the blocks but they will remain as invisible blocks.

Placing other blocks in the location of these invisible blocks will delete them and the block will be lost if done in survival mode

If the ravager is no longer occupying the location of the leaf blocks then updated blocks will reappear

If the ravager is still occupying the location of the leaf blocks then they will reappear momentarily before appearing to be destroyed again and the invisible blocks will remain