bug: Enter (newline) doesn't work properly when splitting an editor

Check the following:

• I have tried setting vscode-neovim.neovimClean in VSCode settings and restarting VSCode.
• I have read the vscode-neovim docs.
• I have searched existing (closed!) issues.

Neovim version (nvim -v)

v0.11.6

VSCode version and flavor (Cursor, vscodium, …)

VSCode 1.110.1

Operating system/version

Windows 11

Problem (including log messages)

If you split an editor window (:vs), switch to the new window, go into Insert mode, then press enter, the cursor does not move to the next line (as it should, and as it does in the first window)

Steps To Reproduce

1. Create a new file, and write some text in it
2. :vs to split the editor. This should automatically move the cursor to the new editor on the right; if that didn't happen, do Ctrl-W l or otherwise navigate to the new editor.
3. Navigate up a few lines (makes the problem more apparent)
4. Go into Insert mode with A, then press enter
5. Newline is created but cursor jumps up to stay on the same line
6. Switch back to original editor on left; this behaviour does not happen.

Expected Behavior

Typing enter should create new line and move cursor to the created new line.