When you press F3 debug screen opens. On right side you can find block state info about block you are looking at. Once I noticed that this info isn't synchronized with actual block state, i.e. it isn't the same as actual block state. I came up with idea that debug screen block state info is based on metadata of block because methods getStateFromMeta and getMetaFromState don't use some properties. Is it true? 

1.12.2 Java edition

 

 

Edited October 19, 20196 yr by AntonBespoiasov

The data shown in the debug screen is the data that the client knows about.

And the only data that the client knows about is the data sent over the network

And the only data sent over the network is the data that can be serialized

And the only data that can be serialized is the data with corresponding metadata values.

So yes, The client only knows about what you tell it via the metadata.