xonsh: style is sometimes ignored

[rsteube]

Current Behavior

example action --<TAB> # has colors
example action --s<TAB> # has no colors

Expected Behavior

No response

Steps To Reproduce

No response

Version

0.47.0

OS

• [X] Linux
• [ ] OSX
• [ ] Windows

Shell

• [ ] Bash
• [ ] Elvish
• [ ] Fish
• [ ] Nushell
• [ ] Oil
• [ ] Powershell
• [X] Xonsh
• [ ] Zsh

Anything else?