Tab in visual block mode applies to first line only

[erigul]

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What did you do?

In a document with multiple lines and the cursor at the beginning of the first line;
Ctrl+v, cursor down to include all lines, Shift+i, Tab, Esc

What did you expect to happen?

All lines that was included in the visual block has white space added

What happened instead?

Only the first line had white space added.
It works if I use Space instead of Tab.

Technical details:

• VSCode Version: 1.10.2
• VsCodeVim Version: 0.6.6
• OS: Win 7

[erigul]

I was trying to have a look at this myself but got stuck at the class InsertInInsertVisualBlockMode in actions.ts where I can see that this action supposed to trigger on <any> key.
During debugging most keys I press hits a breakpoint in the exec function, but I can't get any breakpoints to trigger when clicking TAB

I don't know enough about how the Vim plugin, or VS Code itself, handles Tab so I don't really know where to continue looking.