i had the same issue...this is how i fixed it.
I was on TF97 and it was working fine. Once I flashed TF98 and changed some settings in the TKT app then I started having soft reboot issues. I went back to TF97, and uninstalled TKT and also wipe data from SuperSU. I then proceeded to flash TF98 again. Reinstalled TKT and gave it permissions again through SuperSU and everything seems to work.
And I really think 98 is better than 97. And I was on 97 for a loooong time.