Backslashes are shown while editing with multiple cursors

[luccascorrea]

Describe the issue:
When I use multiple cursors and move around or make changes, some backslash characters appear, I'm not sure why. Please see the GIF.

Steps to reproduce

Here's the sequence of keystrokes in the gif:

vlll<C-n><C-n><tab>hhh<tab>llllllc

As you can see above, a green backslash is shown on the right. This is just one example where this happens but it's happened to me in other situations such as when moving around while multiple cursors are active.

---

• Operating System: Ubuntu 20.04.4
• Vim Version: NVIM v0.9.0 Build type: Release

[luccascorrea]

Here's another example where the backslashes are on top of the actual characters:

And here's the sequence of keystrokes in the gif:

vlll<C-n><C-n><tab>hhh<tab>llllllhhhhh

[mg979]

Is it reproducible with a minimal config?