When selecting a replacement word in the right click spell check interface when in Vim mode, it deletes and inserts everything up to the cursor, but not after it.

This is using deepdwn version 0.17.0 on Windows 10 (x64)

Here's a screenshot of what I mean.

Nice find, I'm seeing the same. I'll get that fixed up.

Still working on this, it's not straightforward at all. :(

In the mean time, a workaround would be to make your spellcheck replacements in insert mode instead of visual mode, or to make sure that your visual mode cursor isn't on the word that needs to be replaced.