I had the same problem several times, but I cannot foundout the case.
And every time it was only on MOS-unsupported iMac G5/2.1 and Powermac G5 Quad/2.5.
On Pegasos 2 and Powerbook panel works OK.
With Powermac I had also problem, that he shows unregistered MOS ( even if was registred) - and in one case when it shows unregistered MOS, the panel stay unsaved with save.
But it is only one context I remember. Finally I succeed save the panel settings on Powermac ( state of MOS was registered this time).
I don't know if it is somehow related or it's just a coincidence.[ Edited by sailor 25.03.2021 - 14:35 ]
AmigaOS: Pegasos II, Sam440ep-flex, Micro A1-C, AmigaOneX1000
MorphOS: Pegasos II, Powerbook G4, iMac G5, Powermac G5 Quad