Thanks for your testing dpdan.
I opened a support ticket with A&H and I have a feeling that this issue will have to be fixed in the next firmware update, rather than by any setting that we may be able to adjust.
As far as the GLD goes, I have extensively used its scene functionality with the AR2412 and it did not exhibit the dropout. I have not, however, used the GLD with the latest Firmware, so you might want to test it.