Problem Description

1. I use Terminal.app (macOS 15.7) with light theme, but mitmproxy with solarized_dark palette and console_palette_transparent: false. All worked consistently for quite a while. I also tried iTerm2 with same result.
2. Updated mitmproxy to 12.2.1, can't remember which version it was before the update, probably something around 11.0.0
3. Now, in flow details, the preview contains bald spots of light background (checked that it corresponds to background color option of the Terminal.app). Screenshots attached.
4. What happend and how to fix it?

System Information

Mitmproxy: 12.2.1 binary
Python:    3.14.0
OpenSSL:   OpenSSL 3.5.4 30 Sep 2025
Platform:  macOS-15.7-x86_64-i386-64bit-Mach-O

Checklist

• This bug affects the latest mitmproxy release.