Red pulsating tile highlight doesn't pulsate with OpenGFX2 High Def

[PeterN]

Red pulsating highlight with OpenGFX2 Classic:

Screencast.from.2025-06-26.15-19-01.webm

Red pulsating highlight with OpenGFX2 High Def:

Screencast.from.2025-06-26.15-20-41.webm

Presumably because the High Def highlight sprites are antialiased, which will break palette animation.

[zephyris]

I've not been able to replicate this, my extra zoom selectors animate.

The relevant sprites are all 8bpp only. There are 1x, 2x and 4x zoom variants. Original source images are 32bpp images, but are converted to 8bpp and coded as 8bpp:

OpenGFX2/baseset/nml/base/base-0674-gui.pnml

Line 161 in 1220ab9

//752-770 tile selectors

(I've also checked the actual images, the only stray pixels which aren't palette index 9 or 13 are found in the 1x version, and those seem to animate fine....)

Which makes this a very odd bug. Zoom-specific, perhaps for a particular blitter? Not sure.