Chrome os version:
70.0.3538.0 Google_Bob.8785.262.0 
Input tools version: 
71.0.20180903.211395702

Steps:
1.Open menu list in keyboard layout
2.Select any input tools from menu list by mouse clicking
3.Press alt+shift+space to switch input tools 
4.Open menu list again

Actual:
Current selected keyboard can be located if select from Menu list 
But if switch input tools by shortcut key , current selected keyboard can not be accurately located ;

See attached video