What version were you on when you saw this behaviour? Can you replicate it? (create a backup to save yourself the re-setup)
Can you help someone else get Gargoyle up and running? TL-WDR3600 : Gargoyle 1.9.0 : NBN FixedWireless
TL-WR1043ND-V2 : Gargoyle 1.8.0 : 3G Huawei E160E
I am using 1.9V, and i created a backup then flashed my router to latest build "gargoyle-ispy 2015-December-29 22:12", but my backup not worked on last update, so i set the settings manually.