[Bug] Wrong RGB color and speed set after cycling through all RGB effects

[P4ntomime]

Describe the Bug

When cycling through RGB effects using the dedicated key (RM_NEXT / RGB Mode +), effects using a single color (e.g. "Breathing") are overridden by the "Mix RGB" Zone 1 settings after one full cycle through all effects.
It affects both color and speed settings.

Keyboard Used

keychron/v6_max/iso_encoder

Link to product page (if applicable)

https://www.keychron.com/products/keychron-v6-max-qmk-via-wireless-custom-mechanical-keyboard-iso-layout-collection

Operating System

Windows 10

qmk doctor Output

Is AutoHotKey / Karabiner installed

• AutoHotKey (Windows)
• Karabiner (macOS)

Other keyboard-related software installed

No response

Additional Context

No response

[P4ntomime]

v6_max_rgb_fix.zip Man, that RGB loop bug is super annoying. I ran into the same thing where the single color modes kept resetting to the zone mix. I ended up tweaking the lighting state logic in the firmware to stop that override from triggering after the cycle completes.

Good to know I'm not the only one!
I've drafted a fix and I'm currently making a PR. My solution was to save both the hsv as well as the speed value before the mixed rgb is rendered and then revert it once it's done. Don't know if this is the best way to do this, but it appears to fix the issue.

[PeterMortensen]

In branch "2025q3", presumably.