Warning: Deprecated. Vim-mode-plus has integrated the patch.
From vim-mode-plus's settings-view set
autoDisableInputMethodWhenLeavingInsertMode to true(default false).
This is a patch for vim-mode-plus. In insert mode, for people who are not native speakers of English, the typed characters are not typed into the buffer immediately, they trigger the input method. When you return to normal mode, the key still triggers the input method, which results in the key corresponding to the vim command can not be applied correctly.
After installing this plug-in, without any configuration to take effect. Unfortunately, the current implementation still has some small bugs. If you have a better program, welcome to report issue.
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.