It also is not working in the latest windows 10 version.

For some reason tellraw's score element doesn't seem to support names that are typed as strings that look like integers even though its supported by scoreboards.
An example of the one im having an issue with.

/tellraw @p {"rawtext" : [

, {"score" : {"name" : "0" , "objective" : "RAMData_0" }}]}

This gives out the error

Syntax error: Unexpected "0": at ">>0<<"