Confirmed on dedicated server for me a well. I created a new world where it did not have this bug, it seems to come at some point.
Confirmed on 20w14a
Affects 18w10c
Sorry, my fault. I was replacing the block with grass instead of grass_block. I forgot that it was changed in 1.13.
Mathias Sørensen
Confirmed on dedicated server for me a well. I created a new world where it did not have this bug, it seems to come at some point.