I never seen that message before today's tests, but since you said something I decided to flash the Stock lockscreen ontop of this ROM and the message is gone

Im going to dwnload the AOSP lockscreen that you also have in the OP and see what happens if I flash that ontop, be right back.
UPDATE:
When I flashed the stock lockscreen ontop of the ROM I dnt see a message but when I flashed the AOSP lockscreen the damn message came back lol!! I really wish I could be more help to you but I dont know a whole lot lol!! but if you have some suggestions on how I can learn some of what youre doing I would gladly spend the time on researching and testing as you knw