You should look into backing up your whole sfos possibly to avoid reflash.
Kabouik made a nice guide how to and it is the only usfull feature of TWRP besides helping to flash sfos currently.

https://gist.github.com/Kabouik/f77539b3eb6a77b032d2fa827271b81d

And yes, Kabouik managed to restore the backup after trying hw issues on android, so it is a "real" working backup you have. Not a schroedinger one