Error in copy pasting, unable to go back to normal mode in Neo Vim.

[mayankdutta]

I just copied a this code.cpp code from codechef and then this weird thing is going on,
see the pic If I am trying to press any key, these ASCII symbol as shown just keep repeating.

More specifically I am facing error while copying and pasting.
one more issue that I was facing was during copying pasting a random character get automatically cut from file and added to the end. however this issue was less frequent, but now it is way weird.

Here is my init.vim

[dm1try]

@mayankdutta please provide Nvim version
might be related #11699

[dm1try]

also see #13921

[mayankdutta]

@mayankdutta please provide Nvim version
might be related #11699

NVIM v0.4.4
Build type: Release
LuaJIT 2.1.0-beta3
(installed via 'brew install neovim')

terminal : iterm2
operating system : macos Big sur version 11.1

issue is exactly #11699
still figuring how to fix.

Thanks for the fast reply !

[dm1try]

first, I would try a development version, see https://github.com/neovim/neovim/wiki/Installing-Neovim#macos--os-x

brew install --HEAD luajit
brew install --HEAD neovim

and follow #13921 if it will not help :)

[mayankdutta]

Thank you very much, you saved my day.
brew install --HEAD neovim
worked for me.
around 4 packages were broken, had to reinstall them.