When playing in multiplayer, I got seeds and planted it first on plowed land. Later my device lagged and cause the plowed land to become just a dirt block but kept the seed in place. The seed didn't 'pop' but stayed in the dirt so that the only part of the seed that was seen was the top pixels.

How to Reproduce?
Join another player's game and plow land to find seeds. Place seeds on plowed land that can easily uproot, lag of failing internet and the seeds should stay in dirt