[Jolla Tablet][3.1.0.11] Boot loop after upgrade

While upgrading my Jolla Tablet from SailfishOS 3.0.0.8 to 3.1.0.11 using the default UI it powered off (with 50% battery). I tried to power it on but got stuck in boot loop. I can get into recovery mode but can't telnet into the specified IP from a Linux PC. Tried several PCs both with USB2 and USB3 ports. Nothing shows up while running 'lsusb'. Any idea on how to fix this? UPDATE: 11th of November 2019: I succeed in booting into an old Ubuntu 14.04.2 from a USB-dongle over OTG. All I need now to restore my Jolla Tablet is the content of /fimage aka. mmcblk0p12 from the Jolla Tablet to dd it to the device. If someone could please upload this it would be really helpful. @kid @condo4