Hello,
Fog 1.3.5 RC10 / Ubuntu 16.04, the error is still present.
The id “FOG_KEY_SEQUENCE” 31, 32, 33, 34 and 35 reset after “Save Changes” in “FOG Settings”
The others id are good.
But the field “FOG_KEY_SEQUENCE” in “iPXE Boot Menu” is operational.