72.0.3623.3 11310.0.0 dev-channel kevin test
Google input tools version: 72.0.20181122.222570995

Steps；
1.Switch to any t13n or m17n keyboards
2.Want to input english character

Actual:
Have to switch to US to input , can not quickly input English character

Expected:
Pressing shift key in physical keyboard have a switch-english function;

Remember in previous version, shift key pressed with physical keyboard can switch to english input；