This to my knowledge happens when you execute sh flash_fp4_factory.sh instead of ./flash_fp4_factory.sh or bash flash_fp4_factory.sh on a script file that uses bash-specific syntax.
Is that what happened?
If not, which linux distribution do you use and how did you start the script?
Wow, thanks a lot! That was it, never knew that there was a difference. Guess you never stop learning 
Does someone know if the Update to TP1X.C.079 is safe? I donāt wanna lose all my data again.
It is recommended to make a backup before updating.
Iāve installed the update and experienced no issues. I was affected by this problem with the update before.
No issues here. Was not affected before.
no backup, no mercy 
No issues here but didnāt experience any issues with update to A13 either even though Iāve tried several custom roms in the past.
Updated a little over a week ago and everything seems to work just fine so far.
It also updated my phone from A12 to A13, despite not mentioning anything about that in the description. I guess itās the A13 update for those using some flavor of Orange (FR, BE, etc.), and who (fortunately) werenāt eligible for the official A13 update.
I managed to do that with adb sendevent some time ago. I had a mobile with broken screen and was lucky enough to have adb enabled. scrcpy should then do the rest.
But without an active session of ADB not a chance Iām afraid.