[users] Power-On messages inop in new GT3-TP?

I got a few new GT3-TP spares, and programmed them with CHIRP as usual. Something's changed in the startup display at boot. I use two parameters under "Setting/Other Settings" to display my CHIRP version level and my call sign on boot:

Power-On Message 1 used to display on the 1st line Power-On Message 2 used to display on the 2nd line (both briefly on boot)

Now, neither works. "GT-3" displays on the 1st line "MARK III" displays on the 2nd line

And the 6+Power-On Message settings seem to also be ignored. They are also greyed out in CHIRP, cannot be changed.

Anybody BTDT? Got a remedy? I already jailbroke the new units with a hard factory reset.