when i play dsiware on my old3ds it shows weird lines i think they can be purple sometimes
https://gbatemp.net/threads/2ds-camera-display-weird-green-or-purple-lines-in-dsi-ware.682122/
boot9strap is what used to load luma 3ds as boot.firm also maybe you just received the update notification as you didn't connect to the internet they did one in 2022 i think
i would attach a proper photo from ndsbtrp if it dint use the boot screen for screenshots in photo dojo it doesnt just show it in ndsbstrp it also shows in the cia install
i have to reboot my entire 3ds trun it off on hold start nav to gm9 it would be helpful to boot it from home mune like gm9i but dsi mode has lower ram so puting files on ram to transfer to dsi sd is a pain