There is a problem with the title command

{{}}Subtitle command in the title command
Cannot output and display normally
The previous version will still work.
It seems to be a problem after updating to 1.7.

There is no 1.7.1 in the problem option.
I had to choose 1.6.1.0 to return
Say the official version has not been released to 1.7?
I downloaded it from the Microsoft Store.

I used google translator to turn Chinese into English.