tmux -CC attach losing some terminal color settings

• iTerm2 version: 2.9.20160426 (and 2.9.20160506)
• OS version: 10.11.4 (15E65)
• Attach com.googlecode.iterm2.plistcom.googlecode.iterm2.plist here: com.googlecode.iterm2.plist
• Attach a debug log (https://iterm2.com/debuglog): debuglog.txt.gz

This may be related to issue [4588] but just in case I'm opening a new issue. Essentially I'm getting what appears to be a loss of color setting whenever I do a tmux -CC attach vs a traditional tmux attach. I'm using the 'base16' iTerm theme from here. I'm also sourcing the following automatically with every new zsh invocation. I've tried running the patched 24-bit version of tmux with the same results.
'Proper' 256 color test in Default iTerm2 Profile - everything works as expected:
`tmux attach` 256 color test - everything works as expected:
`tmux -CC attach` 256 color test - color settings appear to be 'lost':
`tmux -CC attach` 256 color test - color settings get corrected by re-running script previously sourced inside .zshrc:

Yep, definitely a dup of #4588. Please see comments there for various partial solutions.

Status changed to closed