Chrome OS Version: Version 67.0.3339.0 dev 64-bit
Chrome OS Platform: 10561.0.0 Official build dev-channel clapper
Google_clapper 5216.199.7


Steps：
1.Switch to US any layout
2.Go to floating window
3.Switch to Pinyin input method by tap in menu list 
4.Switch back to US keyboard by tapping it in menu list with finger or mouse click



Actual:
It not works ,can not switch to US keybaord, can not tap it 

Note:
1.If switch to other layout ,then tap US again , it is ok
2.Tap other layout it is ok too
3.In dock mode, Tap US is ok when current layout is Pinyin input method