On a server with less than perfect TPS, the Pure Daisy displays the animation of Stone/Wood to LivingRock/Wood.
On mining the block reverts to Stone/Wood.

If left alone for the correct ticks, it will re-animate (Livingrock to Livingrock etc) and can be mined correctly.

I'm assuming the client is predicting the time taken based on 20 tps.
And when this isn't correct the client displays LivingRock/Wood when the server is still on Stone/Wood.

I can record a simple video displaying this if needed. (100% repeatable)

Not an issue since it only happens if you're lagging.

@Vazkii If you eliminate block replacing on client side the issue would be solved. It is really inconvenient as it causes world desynchronisation.

Further the calculation should happen server-side.
Like a furnace, it doesn't display finished burning if its lagging hard