Stuck in FASTBOOT loop, got access to TWRP

[coolbigbear]

Hi,
I got a weird one.
I woke up today to my phone being dead (I didn't plug it in). That's totally fine.
However, no matter what I do I boot into fastboot. Holding down power and VOL UP being the exception as it lets me boot into TWRP.
Currently copying all data from the phone to PC.
Is there any way for me to fix this without wiping the phone?

Any help is much appreciated

 

[coolbigbear]

Managed to fix it by installing the latest MIUI 11 Stable from here using TWRP.
All data was kept.