So I've started using the Go extension yesterday and noticed a weird issue. When formatOnSave is on, I push Ctrl-S and the file is saved several times and the undo stack gets crowded with characters getting selected and deselected. It always selects the same characters that were before the cursor when I pressed Ctrl-S. I tried it with all three formatters and they all do the same.

I think there could be some bigger issue behind this because turning off formatOnSave stops this behavior but the characters in the file still get selected but only once (same here, the character before the cursor).

I use VSCode with Ruby as well and I haven't noticed anything similar. I use the latest Code (1.13.1 I think) and the latest extension. I'm on Ubuntu 17.04.