Unable to navigate between splits with fakevim

Hello,

In Qt Creator 17.0.0-beta2 fakevim split navigation appears to be broken, where it works as expect in 16.0.2.

When running 17.0.0-beta2 from the terminal I get the following when attempting to navigate between splits:
SOFT ASSERT [22:17:43.885]: "pe" in /Users/qt/work/build/qt-creator/src/plugins/fakevim/fakevimplugin.cpp:1312

Steps to reproduce:

1. Enable fakevim in Qt Creator 17.0.0-beta2.
2. Open a file.
3. Press ctrl+w, v, ctrl+w, s.
   1. Splits are created as expected.
4. Press ctrl+w, k or ctrl+w, j.
   1. The cursor does not move between splits.

Thanks!