All .exe apps hang in WSL2 within Tmux but succeed outside Tmux

[matthew-nm]

Windows build number: Version 10.0.19041.172

I am able to run Windows binaries (such as cmd.exe) from WSL2 Ubuntu if I simply open the WSL2 terminal and execute the command from my shell of choice (zsh).

However, if I am inside of a tmux session, the command hangs, returns no output, and I can't kill the command with Ctrl+c. I have to kill the tmux pane and the process ends up stuck in my processes list with the tag [defunct].

Why would being inside tmux prevent a Windows command from executing?

I have included the strace from inside tmux:
strace.txt
and the strace from outside:
strace_outside.txt

Thanks for any insight. I am happy to include more information if asked.

[therealkenc]

Could not repro here.

[matthew-nm]

I was using the WSLtty terminal but have done the same test via Powershell. It still fails within tmux, but a little more gracefully.

test_powershell.txt
test_powershell_tmux.txt

[matthew-nm]

Problem solved. Bought a Mac.

[tsjk]

I have the same problem, under WSL 1. I login to my windows system via ssh, launch wsl and start tmux. All .exe calls hang, but I can abort them with ctrl-c. The same exe calls work from wsl without tmux, and also work under screen. Interestingly enough, they even work if I start a screen session in a tmux window. I wonder if it's some environment setting that messes things up.

[tsjk]

And, indeed.
I had the TERM variable set to TERM="screen-256color". For some reason, this makes exe calls fail. Changing it to TERM="tmux-256color", for instance, seems to be a remedy.