Vim: surround emulation fails with underscore "_"

[waltiam]

The _surround_ emulation fails to remove underscores.

To Reproduce

1. move cursor under a word
2. type ysiw_ to add an underscore around the word
3. type ds_ to remove the underscore just added

Expected behavior
I expected the underscore to be removed, but it is not.

Environment

• Extension (VsCodeVim) version: 0.15.7
• VSCode version: 1.25.1
• OS: w10p -1803 - 17134.81

Additional context
The adding and removing other characters works.

[austintraver]

I'm also having this bug

[breemts]

the same bug happens with asterisk (*)
e.g. yss* and than ds*
also doesn't work with change. e.g. cs*"

this makes editing markdown a bit painful
works fine in normal vim

[rami3l]

Any news on this rather old issue?
Encountered the asterisk problem today when editing markdowns...