I didn’t find a permanent solution yet. It might just have been my macos.
What worked for me was using Alacritty terminal emulator and getting rid of some of my superfluous vim plugins. But with alacritty I need to use tmux, which I am not a big fan of.
Which os do you use? I suggest reworking your vimrc and terminal emulator to see if it works.
Also, I never got around to opening a github issue, but go for it, I would be interested in a better solution as well.