• VSCode Version: Code 1.15.1 (41abd21, 2017-08-16T17:15:57.756Z)
• OS Version: Darwin x64 16.3.0 (macOS)
• Extensions: --disable-extensions

Steps to Reproduce:

1. Open any file.
2. Turn on an IME such as macOS standard IME or Google Japanese IME.
3. Write some texts with the IME.
4. Put ctrl + h.

Expected: Delete the last character on the IME just like backspace.

(in CotEditor)

Actual: Delete the last character on the IME and the character before the IME input.

In the same way, ctrl-A, ctrl-F, and ctrl-B don't work correctly.
I think this is because key down event propagation is not stopped even if the IME is enabled.
#25023 and #24980 are related to this issue.

Reproduces without extensions: Yes