UserAgent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3178.0 Safari/537.36

Steps to reproduce the problem:
1. Install Vimium and enable chrome://flags/#enable-fast-unload, restart Chrome.
2. Open three tabs, A, B, and C. (must all be web pages so extensions can work on)
3. From tab A, switch to tab B, then switch to tab C.
4. Close tab B.
5. Hit ^ key. (the number 6 key with Shift)

What is the expected behavior?
Switch to tab A.
As ^ is the Vimium hotkey to switch between most recently used tabs, and with tab B closed, tab A is now the most recently used tab.

What went wrong?
Nothing happens.
Vimium is not informed that tab B has been closed.

WebStore page: https://chrome.google.com/webstore/detail/vimium/dbepggeogbaibhgnhhndojpepiihcmeb

Did this work before? N/A 

Chrome version: 62.0.3178.0  Channel: dev
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: 

This only repros when running Chrome with --enable-fast-unload.

Please see below for technical details explained by the Vimium developer.
https://github.com/philc/vimium/issues/2567