AGS itself does not do anything outside of guild stores.
The bulk of it's code is only initialized when you visit a guild store for the first time after a UI load.
The only thing that might have something to do with the crashes is libFilters, which gets initialized immediately:
Lua Code:
local libFilters = LibStub("libFilters")
libFilters:HookAdditionalFilter(LAF_GUILDSTORE, BACKPACK_TRADING_HOUSE_LAYOUT_FRAGMENT_BASIC)
libFilters:HookAdditionalFilter(LAF_GUILDSTORE, BACKPACK_TRADING_HOUSE_LAYOUT_FRAGMENT_ADVANCED)