@Estel it is definitely your /home fs type that leads to a reboot loop, the guide on wiki changes a good amount of scripts which system-services overwrites, /usr/lib/genfstab.awk being one of them.

While I agree this file should not be overwritten without a notice, I highly doubt CSSU will ever support changing /home fs type, repartitioning eMMC, etc.

As this is in no way related to -thumb, I would recommend to move the discussion to CSSU-testing thread and filing a bug against CSSU if you think it makes sense.

You may try to solve your problem by following the instructions you've followed to change your /home fs type once again.