neovim split navigation not working in tmux session.

[sharkinsspatial]

Versions

macOS 15.1
ghostty 1.1.2
neovim 0.10.4
tmux 3.5a

As reported in several other issues
#425
#391
#317

Vim split navigation functions outside of a tmux session but not within a tmux session.

Troubleshooting

verbose nmap <C-h>
Last set from ~/.local/share/nvim/lazy/vim-tmux-navigator/plugin/tmux_navigator.vim line 18

:TmuxNavigatorProcessList
Ss   -zsh
S+   nvim

As @BriHan-Tech has mentioned is_vim detection on several other threads I also tested hardcoding is_vim=1 in my tmux.conf and still cannot navigate between vim splits within a tmux session.

[sharkinsspatial]

As an addendum I randomnly discovered today that <ctrl+option+h> works for vim split navigation (as well as jkl). Not sure if this is helpful for trying to diagnosing the issue. I think I can live with that temporarily but it is hard to break years of muscle memory.