Can not use \n

(Ps: I am from Taiwan, English is not very good, Sorry)
You can use \ n to wrap before 1.11.2
But in 1.12-pre6 & 1.12-pre5 can not use \ n to wrap
An error occurred:
[08:36:15] Data tag parsing failed: Invalid escape of 'n' at: ... qua \ ", \" bold \ ": true}, {\" text \ ": \" \ n < [HERE]
Figure: