Not able to place crops on farmland

I was planting crops in my new starter base, I was going to plant a carrot on a farmland.

What I expected to happen was...:
The carrot to be placed on farmland.

What actually happened was...:
The carrot didnt place.

I eventually tried every single crop. It didnt work. Mojang, please fix this.

I cannot find a way to recreate this bug. It happened randomly.

I was on optifine, so it could be an optifine bug, but I'm not 100% sure.