Not 100% as I don't own a G988B but a G988N.
oh that's ok, but i can't keep deleting my data every time, maybe will try that when beta 2 comesNo problem!
If you try this modded twrp can you give me a feedback here?
For the next beta you will have to flash back stock firmware then beta updates one after the other or patching all images using above imagepatchtools. But for stable release you will be able to download full firmware and flash it with odin.